CN108648693A - A kind of drive module for OLED high drives - Google Patents
A kind of drive module for OLED high drives Download PDFInfo
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- CN108648693A CN108648693A CN201810832777.2A CN201810832777A CN108648693A CN 108648693 A CN108648693 A CN 108648693A CN 201810832777 A CN201810832777 A CN 201810832777A CN 108648693 A CN108648693 A CN 108648693A
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- unit
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- oled
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to small size oled panels to drive display field, and in particular to the application to oled panel driving circuit more particularly to a kind of drive module for OLED high drives.It include the differential amplification device assembly for expanding stream, the gain amplifying component being connected across in differential amplification device assembly for adjusting gain, and it is connected on the matching output parameter component of differential amplification device assembly output end, the input termination signal source VG1 of differential amplification device assembly.Therefore, the invention has the advantages that：1. making up the high voltage demands of large scale OLED, usual OLED sizes are bigger, and voltage is higher；2. being not necessarily to very expensive cost, need most 2 triodes that can work.
Description
Technical field
The present invention relates to oled panels to drive display field, and in particular to arrives the application of oled panel driving circuit, especially
It is related to a kind of drive module for OLED high drives.
Background technology
It is aobvious that Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) is also known as organic electric laser
Show, organic luminous semiconductor.It is taught by Chinese descendant in America and was found in the lab in 1979.OLED display technologies have spontaneous
Light, wide viewing angle, almost infinite high contrast, compared with low power consumption, high reaction speed the advantages that.But as high-end display screen,
It also can be more expensive than LCD TV in price
The most important function of OLED tester tables is the timing generator that can be sent out according to OLED internal circuits, OLED's
Timing generator can not only export corresponding waveform according to relevant timing, also have certain driving power, that is,
There can be larger electric current output, can be normally reached 1mA~1000mA, output voltage also requires relatively high, it usually needs 20V
~30V, or -30V~-20V, this just needs individually to build interlock circuit realization with discrete device.
Although the panel itself structure of each OLED manufacturers production differs to the greatest extent, OLED drives most basic circuit shape
Formula ten thousand becomes from its ancestor, as shown in Figure 1.
Under original state, T2 is P types TFT pipes, at this point, Cs capacitances do not have charge, so the Vgs=of Vcs=0V, T2
0V, T2 are closed, and VDD does not provide electric current, and LED does not have electric current to flow through, and does not shine
When scan line Vsel is selected, switch transistor T 1 is opened, and data voltage Vdata fills storage capacitance Cs by T1 pipes
Electricity, the drain current of the voltage control driving tube T2 of Cs
When scan line Vsel is not selected, switch transistor T 1 is ended, and the charge being stored on Cs continues to the grid of T2
Voltage, T2 are tended to remain on, therefore in the entire frame period, OLED is in current constant control.
Fig. 1 is referred to as source electrode and follows structure, is easier to realize in technique, but is disadvantageous in that driving tube T2 threshold values
The inconsistent of voltage will lead to the uneven of the brightness of display screen one by one, and the electric current and data voltage of OLED are in non-linear relation,
It is unfavorable for the adjusting of gray scale.
Circuit shown in Fig. 1 needs to drive Vsel voltages and Vdata voltages during use, can from Fig. 1
Go out, Vsel voltage loads types are TFT, the basic no current of Gate grades basic TFT, but there are parasitic capacitances, usually exist
500pF or so
The loadtype of Vdata is in addition to TFT, and the parasitic capacitance of TFT, also Cs capacitances exist, so the capacitance of Vdata
Property load, the driving voltage needs ± 25V of Vdata and Vsel bigger than the capacity load of Vsel, but in the prior art,
Do not use diffusion measure.
Invention content
The above-mentioned technical problem of the present invention is mainly to be addressed by following technical proposals：
A kind of drive module for OLED high drives, which is characterized in that including
Differential amplification device assembly：Signal source VG1 is met, for being amplified signal source VG1 and expanding stream；
Gain amplifying component：It is connected across in differential amplification device assembly, for adjusting gain factor, amplified signal as desired
Source VG1,
Match output parameter component：Differential amplification device assembly output end, for load impedance, output impedance and output electricity
Range is pressed, and controls output current and adjustment output signal rise time.
In a kind of above-mentioned drive module for OLED high drives, differential amplification device assembly includes for by signal source
The difference amplifier that VG1 is amplified and the expansion stream unit amplified for high-voltage signal.
In a kind of above-mentioned drive module for OLED high drives, the expansion stream unit includes while being connected on difference and put
First on big device expands stream unit, the second expansion stream unit and expands stream unit peripheral assembly.
In a kind of above-mentioned drive module for OLED high drives, described first, which expands stream unit and second, expands stream unit
Include transistor, including it includes several resistance and the capacitance with resistors match to expand stream unit peripheral assembly.
In a kind of above-mentioned drive module for OLED high drives, the matching output parameter component includes
Load impedance matching unit：For correcting output waveform；
Output impedance matching unit：It is connected on load impedance matching unit, is used for Maximum Power Output；
Output voltage matching unit；Expansion stream unit is connect, for adjusting output impedance；
In a kind of above-mentioned drive module for OLED high drives, the gain amplifying component includes gain unit one
And gain unit two, gain unit one connect differential amplifier inputs, gain unit two is connected across on difference amplifier.
In a kind of above-mentioned drive module for OLED high drives, if the load impedance matching unit includes dry doubling
The resistance and capacitance of connection, the load impedance matching unit one terminate the output of difference amplifier, the other end and output impedance
Matching unit connects.
In a kind of above-mentioned drive module for OLED high drives, if the output impedance matching unit includes dry doubling
The resistance and capacitance of connection are grounded after the connection of output impedance matching unit one end, and it is single that the other end connects load impedance matching
One end of member, the output impedance matching unit ground connection is the output end of drive module.
In a kind of above-mentioned drive module for OLED high drives, the output voltage matching unit includes transistor
And several resistance and capacitance, transistor base meet voltage source VS2 through breaker, collector simultaneously after resistance and capacitance with expansion
Flow unit connection, emitter ground connection.
In a kind of above-mentioned drive module for OLED high drives, the positive input of difference amplifier is after resistance
It is connect with signal source VG1.
Therefore, the invention has the advantages that：1. making up the high voltage demands of large scale OLED, usual OLED sizes are bigger,
Voltage is higher；2. being not necessarily to very expensive cost, need most 2 triodes that can work.
Description of the drawings
Fig. 1 is the principle schematic of the prior art.
Fig. 2 is a kind of circuit topology figure of the present invention.
Fig. 3 is one result schematic diagram of emulation (exporting +/- 30V out, breaker SW off) of the present invention.
Fig. 4 is two result schematic diagram of emulation (exporting +/- 25V out, breaker SW off) of the present invention.
Fig. 5 is three result schematic diagram of emulation (exporting +/- 20V out, breaker SW off) of the present invention.
Fig. 6 is four result schematic diagram of emulation (exporting +/- 15V out, breaker SW on) of the present invention.
Fig. 7 is five result schematic diagram of emulation (exporting +/- 10V out, breaker SW on) of the present invention.
Fig. 8 is six result schematic diagram of emulation (exporting +/- 5V out, breaker SW on) of the present invention.
Specific implementation mode
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment：
One, the circuit topology for introducing the present invention first, as shown in Fig. 2, the present invention includes
1, it is used for differential amplification device assembly；
Differential amplification device assembly includes difference amplifier for signal source VG1 to be amplified and is used for high-voltage signal
The expansion stream unit of amplification, expand stream unit include be connected on simultaneously on difference amplifier first expand stream unit, second expand stream unit with
And expand stream unit peripheral assembly；Described first, which expands stream unit and second, expands stream unit including transistor, including expands outside stream unit
It includes several resistance and the capacitance with resistors match to enclose component, the positive input of difference amplifier after resistance with signal source
VG1 connections.
2, the gain amplifying component being connected across in differential amplification device assembly for adjusting gain；
Including gain unit one and gain unit two, gain unit one connects differential amplifier inputs, gain unit two
It is connected across on difference amplifier.
3, the matching output parameter component of differential amplification device assembly output end, the input termination of differential amplification device assembly are connected on
Signal source VG1, including
Load impedance matching unit：For correcting output waveform；
Output impedance matching unit：It is connected on load impedance matching unit, is used for Maximum Power Output；
Output voltage matching unit；Expansion stream unit is connect, for adjusting output impedance；；
Load impedance matching unit includes the resistance and capacitance of several parallel connections, and the load impedance matching unit one terminates
The output of difference amplifier, the other end are connect with output impedance matching unit.
Output impedance matching unit includes the resistance and capacitance of several parallel connections, and output impedance matching unit one end connects
It is grounded after connecing, the other end connects load impedance matching unit, and one end of the output impedance matching unit ground connection is drive module
Output end.
Output voltage matching unit includes that transistor and several resistance and capacitance, transistor base connect voltage through breaker
Source VS2, collector are connect after resistance and capacitance with expansion stream unit simultaneously, emitter ground connection.
Two, concrete case is described below in conjunction with the accompanying drawings.
As shown in Fig. 2, VG1 inputs for signal, matches the output voltage matching unit of output parameter component and is exported for signal,
Output signal can drive Vsel or Vdata to load.
Expand stream unit to use to pipe triode, be used for extended output current, the principle for expanding stream, which is triode, to be had and put
Big effect, Ic=150*Ib (Ic is transistor collector electric current, and Ib is triode base current)
Expand stream several resistance of unit matching difference amplifier to be used together, is to expand one of triode base in stream unit
Step voltage V1=(V0+Vdata)/2, the base step voltage V2=(- V0+Vdata)/2 of another triode, at this time difference put
The power supply of big device is always V1-V2, and V0 is the input direct-current voltage for expanding stream unit；
Gain amplifying component is the gain for the circuit is arranged, in this case, GAIN=(R1/R2)+1=5, and gain amplification
Component includes gain unit one and gain unit two, wherein R1 is one resistance value of gain unit, and R2 is the electricity of gain unit two
Resistance value.
The effect of load impedance matching unit has 3, and 1：Control output current 2：Matched load impedance 3：Adjustment output letter
Number rise time.
The effect of output impedance matching unit is matching output impedance.
The effect of output voltage matching unit is matched output voltage range.
When work：
Module for power supply power supply is ± V0, and when output is ﹢ V1, the voltage at load impedance matching unit is V1, the
One voltage expanded at stream unit is V2, and the second voltage expanded at stream unit is-V3, and the supply voltage of difference amplifier is at this time
V2- (- V3)≤V0, book requirement up to specification.
Module for power supply power supply be ± V0, when output be-V1 when, carry impedance matching unit at voltage be-V1, first
Expand stream unit at voltage be V3, second expand stream unit at voltage be-V2, at this time the supply voltage of ADA4870 be V3- (-
V2)≤40V, book requirement up to specification.
Three, it emulates.
Using TINA software emulations result as shown in Fig. 3-Fig. 8.
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (10)
1. a kind of drive module for OLED high drives, which is characterized in that including
Differential amplification device assembly：Signal source VG1 is met, for being amplified signal source VG1 and expanding stream；
Gain amplifying component：It is connected across in differential amplification device assembly, for adjusting gain factor, amplified signal source as desired
VG1,
Match output parameter component：Differential amplification device assembly output end is used for load impedance, output impedance and output voltage model
It encloses, and controls output current and adjustment output signal rise time.
2. a kind of drive module for OLED high drives according to claim 1, which is characterized in that difference amplifier
Component includes difference amplifier for signal source VG1 to be amplified and the expansion stream unit amplified for high-voltage signal.
3. a kind of drive module for OLED high drives according to claim 1, which is characterized in that the expansion stream is single
First first for including while being connected on difference amplifier expands stream unit, unit is flowed in the second expansion and expands stream unit peripheral assembly.
4. a kind of drive module for OLED high drives according to claim 3, which is characterized in that described first expands
Flow unit and second expand stream unit include transistor, including expand stream unit peripheral assembly include several resistance and with resistance
The capacitance matched.
5. a kind of drive module for OLED high drives according to claim 1, which is characterized in that the matching
Output parameter component includes
Load impedance matching unit：For correcting output waveform；
Output impedance matching unit：It is connected on load impedance matching unit, is used for Maximum Power Output；
Output voltage matching unit；Expansion stream unit is connect, for adjusting output impedance.
6. a kind of drive module for OLED high drives according to claim 5, which is characterized in that the gain is put
Big component includes gain unit one and gain unit two, and gain unit one connects differential amplifier inputs, gain unit two across
It is connected on difference amplifier.
7. a kind of drive module for OLED high drives according to claim 5, which is characterized in that the load resistance
Anti- matching unit includes the resistance and capacitance of several parallel connections, and the load impedance matching unit one terminates the defeated of difference amplifier
Go out, the other end is connect with output impedance matching unit.
8. a kind of drive module for OLED high drives according to claim 5, which is characterized in that the output resistance
Anti- matching unit includes the resistance and capacitance of several parallel connections, is grounded after the connection of output impedance matching unit one end, another
One end of end connection load impedance matching unit, the output impedance matching unit ground connection is the output end of drive module.
9. a kind of drive module for OLED high drives according to claim 5, which is characterized in that the output electricity
It includes transistor and several resistance and capacitance to press matching unit, and transistor base meets voltage source VS2 through breaker, and collector is same
When after resistance and capacitance with expand stream unit connect, emitter be grounded.
10. a kind of drive module for OLED high drives according to claim 2, which is characterized in that differential amplification
The positive input of device is connect after resistance with signal source VG1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832777.2A CN108648693A (en) | 2018-07-26 | 2018-07-26 | A kind of drive module for OLED high drives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832777.2A CN108648693A (en) | 2018-07-26 | 2018-07-26 | A kind of drive module for OLED high drives |
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| Publication Number | Publication Date |
|---|---|
| CN108648693A true CN108648693A (en) | 2018-10-12 |
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ID=63760273
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810832777.2A Pending CN108648693A (en) | 2018-07-26 | 2018-07-26 | A kind of drive module for OLED high drives |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1407716A (en) * | 2001-08-16 | 2003-04-02 | 松下电器产业株式会社 | Gain variable amplifier |
| JP2003271103A (en) * | 2002-03-13 | 2003-09-25 | Matsushita Electric Ind Co Ltd | Controller for led display unit |
| CN1497523A (en) * | 2002-10-17 | 2004-05-19 | ������������ʽ���� | Electronic circuit, electro-optical device and electronic instrument |
| CN101009081A (en) * | 2006-01-24 | 2007-08-01 | 三星电机株式会社 | LED driving apparatus with temperature compensation function |
| CN200956564Y (en) * | 2006-08-31 | 2007-10-03 | 朱洪兵 | Amplifier |
| CN101834567A (en) * | 2010-06-03 | 2010-09-15 | 中国人民解放军国防科学技术大学 | Broadband gain adjustable low-noise amplifier |
-
2018
- 2018-07-26 CN CN201810832777.2A patent/CN108648693A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1407716A (en) * | 2001-08-16 | 2003-04-02 | 松下电器产业株式会社 | Gain variable amplifier |
| JP2003271103A (en) * | 2002-03-13 | 2003-09-25 | Matsushita Electric Ind Co Ltd | Controller for led display unit |
| CN1497523A (en) * | 2002-10-17 | 2004-05-19 | ������������ʽ���� | Electronic circuit, electro-optical device and electronic instrument |
| CN101009081A (en) * | 2006-01-24 | 2007-08-01 | 三星电机株式会社 | LED driving apparatus with temperature compensation function |
| CN200956564Y (en) * | 2006-08-31 | 2007-10-03 | 朱洪兵 | Amplifier |
| CN101834567A (en) * | 2010-06-03 | 2010-09-15 | 中国人民解放军国防科学技术大学 | Broadband gain adjustable low-noise amplifier |
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Application publication date: 20181012 |