CN100356419C - Dynamic image driving circuit and method for organic electroluminescent displaying screen - Google Patents
Dynamic image driving circuit and method for organic electroluminescent displaying screen Download PDFInfo
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Abstract
The present invention relates to a circuit and a method for driving a dynamic image of an organic electroluminescent display screen, namely a circuit and a method for driving a dynamic image of an OLED display screen, which belongs to the technical field of an OLED display screen drive. The present invention has the technical scheme that an external data storage module and an image data downloading interface module are added on a drive circuit of the existing OLED display screen, the external data storage module is used for storing the dynamic image to display a needful image data file having large capacity, the image data downloading interface module is used for the image data file to be written in the external data storage module. The present invention has the advantages of extensible and compatible display functions, simple structure, universal components, low cost and easy operation, and can drive an OLED display to play a moving image and fully show the characteristics of the OLED display.
Description
Affiliated technical field
The present invention relates to a kind of dynamic image driving circuit and method of organic EL display panel, promptly relate to a kind of dynamic image driving circuit and method of OLED display screen, belong to the technical field that the OLED display screen drives.
Background technology
Current flat-panel display device makes rapid progress, and still is in the development stage at home as the newcomer OLED display screen of flat-panel display device, for the development of this display device driving circuit, domesticly also is in the ground zero stage.
The driving circuit of existing OLED display screen and method can be summarized as follows.Existing OLED display driver circuit comprises power module, single chip control module and OLED display screen control module, and OLED display screen control module driving OLED display screen is luminous.Existing OLED display panel drive method: 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 and the power supply of 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, and single chip control module transmits control signal to OLED display screen control module, makes its co-ordination; OLED display screen control module provides analog current signal for the OLED display screen, view data is imported OLED display screen control module, under the control of the control signals such as reading and writing that single chip control module is sent, OLED display screen control module converts view data the current signal of simulation to, and the driving OLED display screen is luminous.
The shortcoming of background technology is that the storer of depositing view data and program is the inside ROM of single chip control module, be subject to this inside ROM memory limitations, the image data amount of depositing is very limited, usually can only deposit the view data of some width of cloth still images, therefore, the driving circuit of existing OLED display screen and method only can accomplish that the driving OLED display screen shows some width of cloth still images or character in the mode that shows lantern slide, can't support the dynamic image of large capacity image data to show.
Summary of the invention
First technical matters that the present invention will solve is to release the dynamic image driving circuit of a kind of OLED, and this driving circuit makes the OLED display screen can show dynamic image, can play moving frame.
It is to increase external data storage module and image data download interface module on the driving circuit of existing OLED display screen that the present invention solves the problems of the technologies described above the technical scheme that is adopted, the external data storage module is used for depositing dynamic image and shows required large capacity image data file, and the image data download interface module is used for described image data file is write the external data storage module.
Now describe technical scheme of the present invention in detail.
A kind of dynamic image driving circuit of organic EL display panel, contain power module (1), single chip control module (2) and OLED display screen control module, the VSS of power module (1), VCPU and VCC pin are respectively ground wire, + 3.3V output terminal and+the 9V output terminal, the VSS pin ground connection of single chip control module (2) and OLED display screen control module, the VCPU pin of single chip control module (2) is connected with+3.3V output terminal, the VDDH of OLED display screen control module and VCC pin are connected with+9V output terminal with+3.3V respectively, single chip control module (2) is connected with OLED display screen control module with control line by data line, it is characterized in that, it also contains external data storage module (3) and image data download interface module (4), external data storage module (3) is that memory capacity is between the Flash of 4～64M byte storer, the VCC of external data storage module (3) and VSS pin are connected with ground wire with+3.3V output terminal respectively, external data storage module (3) is connected with single chip control module (2) with control line by data line, the VCC of image data download interface module (4) and GND pin are connected with ground wire with+3.3V output terminal respectively, the data input pin R2IN of image data download interface module (4) is connected with the input interface of view data by data line, and image data download interface module (4) is connected with single chip control module (2) with control line by data line.
Technical scheme of the present invention is further characterized in that, external data storage module (3) is that memory capacity is the Flash storer of 16M byte, the model of external data storage module (3) is K9F2808, the I/O0 of external data storage module (3)～I/O7 pin is connected with the P3.0～P3.7 pin of single chip control module (2) respectively by data line, the pin R/B of external data storage module (3), RE, CE, CLE, WE is connected with the pin P1.0～P1.4 of single chip control module (2) respectively by control line, the pin ALE of external data storage module (3) is connected by the pin P2.0 of control line with single chip control module (2), the pin WD of external data storage module (3) is connected by the pin P2.7 of control line with single chip control module (2), the input interface of view data (41) is the RS232 serial line interface, be used for being connected with computing machine, the model of image data download interface integrated circuit (40) is MAX3232, first electric capacity (42) is connected across between the VCC and GND pin of image data download interface integrated circuit (40), second electric capacity (43) is connected across between the VCC and V+ pin of image data download interface integrated circuit (40), the 3rd electric capacity (44) is connected across between the V-pin and ground wire of image data download interface integrated circuit (40), the 4th electric capacity (45) is connected across between the C1+ and C1-pin of image data download interface integrated circuit (40), the 5th electric capacity (46) is connected across between the C2+ and C2-pin of image data download interface integrated circuit (40), first, second, the 3rd, the 4th, the 5th electric capacity (42,43,44,45,46) capacitance is 0.1 μ f, and the T2IN of image data download interface integrated circuit (40) is connected with the P0.1 pin with the P0.0 of single chip control module (2) respectively by data line with the T2OUT pin.
Technical scheme of the present invention is further characterized in that it also contains USB interface (5), the VSSOUT of USB interface (5) and GND pin respectively with power module (1)+9V is connected with the GND pin, the D0 of USB interface (5)～D7 pin is linked the P3.0～P3.7 pin of single chip control module (2) by data line, the D12A0 of USB interface (5), RD, WR, D12RST, D12CS by control line respectively with the P1.0 of single chip control module (2), P1.1, P1.4, P1.5, P1.7 links to each other.
Second technical matters that the present invention will solve is the dynamic image driving method that proposes a kind of organic EL display panel.The present invention makes above-mentioned technical matters be resolved by the following technical solutions: this method needs to implement in described driving circuit, comprise the download images data and play two steps of moving frame, during the download images data, with the input interface (41) of image data file by the view data of OLED display screen control module, deposit external data storage module (3) in, it is the Flash storer, when playing moving frame, the mode that single chip control module (2) is read 16 two field pictures with per second is read and is stored in the view data that deposits in the external data storage module (3), by OLED display screen control module, the driving OLED display screen shows the continuous display image of mode of 16 two field pictures with per second, promptly plays moving frame.
Now describe technical scheme of the present invention in detail.
A kind of dynamic image driving method of organic EL display panel is characterized in that operation steps:
First step download images data
The program of download images data is write the RAM buffer memory of the microprocessor (20) in the single chip control module (2) by jtag interface, the input interface (41) of the view data of PC and described driving circuit is linked together with the RS232 line, move the program in the described RAM buffer memory, move the serial communication program on the PC simultaneously, microprocessor (20) initialization, also initialization of external data storage module (3) simultaneously, microprocessor (20) is opened the RS232 serial ports, the wait view data transmits, view data to be received, earlier view data is write the RAM buffer memory of microprocessor (20), again the view data in the described RAM buffer memory is write external data storage module (3), view data is divided into a section and writes external data storage module (3), terminal check one time, if there is not mistake, then image data download finishes;
Second step was play moving frame
The program of driving OLED display screen is write the RAM buffer memory of the microprocessor (20) in the single chip control module (2) by jtag interface, when moving this program, microprocessor (20) initialization, external data storage module (3) is read preparation, the initialization of OLED display screen control module, single chip control module (2) is read the mode of 16 two field pictures and read view data from external data storage module (3) with per second, write the RAM buffer memory of microprocessor (20), again the view data in the described RAM buffer memory is passed to the OLED display control module, single chip control module (2) is also sent into and is read simultaneously, write control signal, the co-ordination of control OLED display control module, the driving OLED display screen shows the continuous display image of mode of 16 two field pictures with per second, because persistence of vision makes the people who sees described display image think that the finding picture is movable.
Compare with background technology, the present invention has following advantage:
1. driving circuit of the present invention and method can be play moving frame by the driving OLED display
Background technology can only show some width of cloth still images or character by the driving OLED display.The shortcoming of background technology is exactly that view data and program all leave among the interior ROM of single chip control module, and this ROM memory capacity is little, can't store dynamic image and show required large capacity image data.The Flash storer of driving circuit of the present invention and method adjunction large storage capacity outside single chip control module, show required large capacity image data with this memory stores dynamic image, therefore can play moving frame by the driving OLED display, than going a step further before simple demonstration still image or the character.
2. Presentation Function both can be expanded, also can be compatible
Driving circuit of the present invention is provided with USB interface.Patch together by the control circuit of USB interface, can on the basis that needn't change circuit, the existing off-line displaying video image function of script be extended to online playing video image function with the band USB plug.
If the image data file of storage tableaux and character in the Flash of external large storage capacity storer, as long as add a certain amount of time-delay in every interframe, driving circuit then of the present invention can be finished the task that the driving OLED display shows still image and character in the same old way.In other words, driving circuit of the present invention has compatibility function: can play moving frame by the driving OLED display, also can show still image and character by the driving OLED display.
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.
4. the characteristics that can fully represent the OLED display
The Flash storer of external large storage capacity is given the function of the broadcast dynamic image of OLED circuit of display driving, the characteristics of OLED display screen wide viewing angle, high contrast, high brightness, rapid reaction, nothing hangover, high luminous efficiency can be represented fully, this be the tableaux of magic lantern chip show can't represent.Therefore, driving circuit of the present invention is particularly suitable for being used for the performance of comprehensive test OLED display, makes the back road inspection process of OLED display device be able to better realization.
Description of drawings
Fig. 1 is the structured flowchart of driving circuit of the present invention.
Fig. 2 is a part of circuit diagram of driving circuit of the present invention.
Fig. 3 is another part circuit diagram of driving circuit of the present invention.
The complete circuit diagram of driving circuit of the present invention is made up of Fig. 2 and Fig. 3.
Fig. 4 is the fundamental diagram of driving circuit of the present invention.
Fig. 5 is the process flow diagram of downloading images data.
Fig. 6 is a process flow diagram of playing moving frame.
Embodiment
The principle of work of driving circuit of the present invention.See Fig. 4.
First step download images data.Because used OLED display screen control module is supported 16 rank gray scales, so a pixel accounts for the 4bit storage space.After image interception, handle the data of wanting exactly of gained by the form of each pixel 4bit.The capacity of data maximum, promptly the memory capacity of external data storage module (3) is 16M.The size of one two field picture is: 128*128*4=65536bit=8192byte.So the frame number that the maximum of external data storage module (3) can be deposited is: 16M/8192=2k.If per second plays 16 frames, then single-wheel maximum play time: 2k/16=128 second promptly can reach clock more than 2 minutes, this for OLED display screen circulation demonstration with enough.Because the OLED display screen is the less screen of size, so the playback rate of per second 16 frames looks very smooth.If want the single-wheel reproduction time longer, also can select for use more jumbo Flash storer to make external data storage module (3).
During the download images data, see Fig. 5.At first the program of data download is write the RAM buffer memory of the microprocessor (20) of single chip control module (2) by jtag interface.The input interface (4 1) of the view data of PC and driving circuit of the present invention is linked together with the RS232 line.Working procedure moves the serial communication program on the PC simultaneously.Little processing (20) device initialization of single chip control module (2) writes initialization command to outside data memory module (3), and the microprocessor of single chip control module (20) is opened the RS232 serial ports and waited for that view data transmits.When receiving view data, earlier view data is write the RAM buffer memory of the microprocessor (20) of single chip control module (2), again the view data in the RAM buffer memory is write external data storage module (3).View data is divided into a section and writes external data storage module (3) like this.Terminal check one time, if there is not mistake, then image data download finishes.
Second step was play moving frame.See Fig. 6.By jtag interface the program of driving OLED display screen is write the RAM buffer memory of the microprocessor (20) of single chip control module (2) earlier.During working procedure, the microprocessor (20) of initialization single chip control module (2), external data storage module (3) is read preparation, the initialization of OLED display screen control module.The microprocessor (20) of single chip control module (2) is read view data from external data storage module (3) then, write the RAM buffer memory of the microprocessor (20) of single chip control module (2), again the view data among this RAM is passed to OLED display screen control module.Single chip control module (2) is also sent into control signals such as reading and writing simultaneously, control the co-ordination of OLED display screen control module, on the OLED display screen, show final because persistence of vision makes the people who sees display image produce the sensation that display image is activity like this by the extremely short consecutive image in interval.After one time view data runs through, from the beginning read again, formed continual circulation.
Claims (4)
1. the dynamic image driving circuit of an organic EL display panel, contain power module (1), single chip control module (2) and OLED display screen control module, the VSS of power module (1), VCPU and VCC pin are respectively ground wire, + 3.3V output terminal and+the 9V output terminal, the VSS pin ground connection of single chip control module (2) and OLED display screen control module, the VCPU pin of single chip control module (2) is connected with+3.3V output terminal, the VDDH of OLED display screen control module and VCC pin are connected with+9V output terminal with+3.3V respectively, single chip control module (2) is connected with OLED display screen control module with control line by data line, it is characterized in that, it also contains external data storage module (3) and image data download interface module (4), external data storage module (3) is that memory capacity is between the Flash of 4～64M byte storer, the VCC of external data storage module (3) and VSS pin are connected with ground wire with+3.3V output terminal respectively, external data storage module (3) is connected with single chip control module (2) with control line by data line, the VCC of image data download interface module (4) and GND pin are connected with ground wire with+3.3V output terminal respectively, the data input pin R2IN of image data download interface module (4) is connected with the input interface of view data by data line, and image data download interface module (4) is connected with single chip control module (2) with control line by data line.
2. the dynamic image driving circuit of organic EL display panel according to claim 1, it is characterized in that, external data storage module (3) is that memory capacity is the Flash storer of 16M byte, the model of external data storage module (3) is K9F2808, the I/O0 of external data storage module (3)～I/O7 pin is connected with the P3.0～P3.7 pin of single chip control module (2) respectively by data line, the pin R/B of external data storage module (3), RE, CE, CLE, WE is connected with the pin P1.0～P1.4 of single chip control module (2) respectively by control line, the pin ALE of external data storage module (3) is connected by the pin P2.0 of control line with single chip control module (2), the pin WD of external data storage module (3) is connected by the pin P2.7 of control line with single chip control module (2), the input interface of view data (41) is the RS232 serial line interface, is used for being connected with computing machine.The model of image data download interface integrated circuit (40) is MAX3232, first electric capacity (42) is connected across between the VCC and GND pin of image data download interface integrated circuit (40), second electric capacity (43) is connected across between the VCC and V+ pin of image data download interface integrated circuit (40), the 3rd electric capacity (44) is connected across between the V-pin and ground wire of image data download interface integrated circuit (40), the 4th electric capacity (46) is connected across between the C1+ and C1-pin of image data download interface integrated circuit (40), the 5th electric capacity (45) is connected across between the C2+ and C2-pin of image data download interface integrated circuit (40), first, second, the 3rd, the 4th, the 5th electric capacity (42,43,44,46,45) capacitance is 0.1 μ f, and the T2IN of image data download interface integrated circuit (40) is connected with the P0.1 pin with the P0.0 of single chip control module (2) respectively by data line with the T2OUT pin.
3. the dynamic image driving circuit of organic EL display panel according to claim 1 and 2, it is characterized in that, it also contains USB interface (5), the VSSOUT of USB interface (5) and GND pin respectively with power module (1)+9V is connected with the GND pin, the D0 of USB interface (5)～D7 pin is linked the P3.0～P3.7 pin of single chip control module (2) by data line, the D12A0 of USB interface (5), RD, WR, D12RST, D12CS by control line respectively with the P1.0 of single chip control module (2), P1.1, P1.4, P1.5, P1.7 links to each other.
4. need the dynamic image driving method of a kind of organic EL display panel in the dynamic image driving circuit of the described organic EL display panel of claim 1,2 or 3, implement, it is characterized in that operation steps:
First step download images data
The program of download images data is write the RAM buffer memory of the microprocessor (20) in the single chip control module (2) by jtag interface, the input interface (41) of the view data of PC and described driving circuit is linked together with the RS232 line, move the program in the described RAM buffer memory, move the serial communication program on the PC simultaneously, microprocessor (20) initialization, also initialization of external data storage module (3) simultaneously, microprocessor (20) is opened the RS232 serial ports, the wait view data transmits, view data to be received, earlier view data is write the RAM buffer memory of microprocessor (20), again the view data in the described RAM buffer memory is write external data storage module (3), view data is divided into a section and writes external data storage module (3), terminal check one time, if there is not mistake, then image data download finishes;
Second step was play moving frame
The program of driving OLED display screen is write the RAM buffer memory of the microprocessor (20) in the single chip control module (2) by jtag interface, when moving this program, microprocessor (20) initialization, external data storage module (3) is read preparation, the initialization of OLED display screen control module, single chip control module (2) is read the mode of 16 two field pictures and read view data from external data storage module (3) with per second, write the RAM buffer memory of microprocessor (20), again the view data in the described RAM buffer memory is passed to the OLED display control module, single chip control module (2) is also sent into and is read simultaneously, write control signal, the co-ordination of control OLED display control module, the driving OLED display screen shows the continuous display image of mode of 16 two field pictures with per second, because persistence of vision makes the people who sees described display image think that the finding picture is movable.
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| CN1987972B (en) * | 2005-12-23 | 2010-12-29 | 上海广电电子股份有限公司 | Video frequency driving system and its method for organic light emitting diode display screen |
| US7903047B2 (en) * | 2006-04-17 | 2011-03-08 | Qualcomm Mems Technologies, Inc. | Mode indicator for interferometric modulator displays |
| CN101312013B (en) * | 2007-05-22 | 2010-10-06 | 比亚迪股份有限公司 | LCD module group demonstration system |
Citations (3)
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| JPS60122995A (en) * | 1983-11-08 | 1985-07-01 | エステイーシー・ピーエルシー | Partially observable electronic book |
| CN1336629A (en) * | 2000-07-28 | 2002-02-20 | Lg电子株式会社 | Driving circuit used for organic electroluminescent device |
| JP2004126022A (en) * | 2002-09-30 | 2004-04-22 | Patoraito:Kk | Display device provided with preview function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60122995A (en) * | 1983-11-08 | 1985-07-01 | エステイーシー・ピーエルシー | Partially observable electronic book |
| CN1336629A (en) * | 2000-07-28 | 2002-02-20 | Lg电子株式会社 | Driving circuit used for organic electroluminescent device |
| JP2004126022A (en) * | 2002-09-30 | 2004-04-22 | Patoraito:Kk | Display device provided with preview function |
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| Title |
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| 基于HD66773的TFT OLED驱动电路的设计 杨虹，曹镛.液晶与显示，第19卷第1期 2004 * |
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