CN100428328C - Driving device for resolving display dispersion - Google Patents
Driving device for resolving display dispersion Download PDFInfo
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- CN100428328C CN100428328C CNB2004100962008A CN200410096200A CN100428328C CN 100428328 C CN100428328 C CN 100428328C CN B2004100962008 A CNB2004100962008 A CN B2004100962008A CN 200410096200 A CN200410096200 A CN 200410096200A CN 100428328 C CN100428328 C CN 100428328C
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Abstract
The present invention discloses a device which ensures that a display only needs shared reference voltage sources or current sources to generate different practical operation voltage or operation current for a source driving device with different primitive colors through a transfer function built in a digital/analog converter. The distribution of the relation curves between the practical operation voltage and the brightness of the source driving device with different primitive colors can be coincident according to actual voltage derived from the transfer function, so that the present invention can solve the problem of chromatic dispersion of a display which corresponds to the source driving device with different primitive colors.
Description
Technical field
The present invention relates to a kind of drive unit of display, a kind of power source drive device that provides its three primary colors source class drive unit of display can have driving voltage separately or electric current particularly is provided.
Background technology
Up to now, in the active matrix display device of driven, its voltage for the trichromatic source class drive unit of pixel is supplied with design, and all designing provides single driving voltage to the trichromatic source class drive unit of pixel.But because the pixel three primary colors are also inequality for the reaction of voltage, so prior art is supplied with design and incorrect for the voltage of trichromatic source class drive unit.
The synoptic diagram of the operating voltage that Figure 1 shows that display picture element source class drive unit and the pixel intensity of corresponding single look.In general, the driving voltage that offers the simulation of pixel source class drive unit is being output to pixel source class drive unit, be with digitally coded digital signal as expression, this digital signal is converted to the driving voltage of the required simulation of pixel source class drive unit again by digital/analog converter.Therefore, the numerical coding that can be considered with driving voltage of the analog voltage of driving voltage presents direct ratio.And after pixel source class drive unit is accepted this driving voltage, the brightness of its respective pixel will will present a curve with the numerical coding of representing driving voltage originally.
The synoptic diagram of the operating voltage that Figure 2 shows that display picture element source class drive unit and corresponding three primary colors pixel intensity.When display three primary colors pixel source class drive unit is all accepted the single operation Control of Voltage, different pixels source class drive unit, its corresponding pixel will have different presenting in brightness, promptly as shown in Figure 2, under identical operations voltage, red (R) pixel, green (G) pixel and indigo plant (B) pixel are to present different brightness curves.Above-mentioned situation will make display produce the problem of chromatic dispersion.
Thereby, a kind of drive unit that solves display dispersion be badly in need of to be proposed, be used to provide display different pixels source class drive unit to have separately operating voltage, with the chromatic dispersion problem of effective solution display.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of drive unit and method that solves display dispersion, in order to solve the chromatic dispersion problem that display has.
To achieve these goals, the invention provides a kind of drive unit that solves display dispersion, it is characterized in that, has conversion equipment, this conversion equipment receives the digital signal of representing first driving voltage, conversion equipment moves voltage according to a transfer function with one second driving voltage, one the 3rd driving voltage and a 4 wheel driven that the digital signal conversion is output as simulation, and exports the moving voltage of second driving voltage, the 3rd driving voltage and 4 wheel driven to three primary colors source class drive unit separately respectively.
In preferred embodiment of the present invention, above-mentioned transfer function is for setting up according to its operating voltage luminosity curve map separately of three primary colors.And, if digital signal represents with Vdata, transfer function with (Kr, Kg, Kb) expression, and first driving voltage, second driving voltage and the 3rd driving voltage represent with Vr, Vg, Vb, then Vr, Vg, Vb and Vdata and (Kb) relational expression between is for Kr, Kg:
Vr＝Kr×Vdata
Vg＝Kg×Vdata
Vb＝Kb×Vdata
In addition, conversion equipment itself can be a digital/analog converter that has transfer function in.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is its operating voltage of display picture element source class drive unit and the synoptic diagram of the pixel intensity of corresponding single look;
Fig. 2 is its operating voltage of display picture element source class drive unit and the synoptic diagram of corresponding three primary colors pixel intensity;
Fig. 3 is the synoptic diagram that three primary colors source class drive unit individual operation voltage and respective pixel brightness are provided in the preferred embodiment of the present invention;
Fig. 4 is the synoptic diagram of the drive unit of the solution display dispersion in the preferred embodiment of the present invention; And
Fig. 5 is the synoptic diagram of the drive unit of the solution display dispersion of another preferred embodiment of the present invention.
Wherein, Reference numeral:
400: drive unit
410,510: analog/digital converter
420,520: digital signal
430,440,450: analog voltage signal
530,540,550: analog current signal
460,560: red pixel source class drive unit
470,570: green pixel source class drive unit
480,580: blue pixel source class drive unit
Embodiment
Please refer to shown in Figure 3ly, A, B, C are respectively the synoptic diagram that three primary colors source class drive unit individual operation voltage and respective pixel brightness are provided in the preferred embodiment of the present invention among Fig. 3.Notion of the present invention is for providing three primary colors source class drive unit operating voltage separately, therefore shown in A among Fig. 3, at red pixel, green pixel, its corresponding source class drive unit of blue pixel, these source class drive units operating voltage separately is provided, and the operating voltage of promptly corresponding red pixel, green pixel and blue pixel all has its numerical coding curve separately.
Shown in C among Fig. 3, for allow described each represent the pairing pixel intensity curve of numerical coding of the operating voltage of operating voltage (red pixel, green pixel and blue pixel) can be identical, must distribute according to the brightness curve between the operating voltage shown in the B among Fig. 3 and each pixel and decide.Therefore, offer the operating voltage of different color pixel source class drive units, must define according to the brightness curve figure of pixel and operating voltage.
In order to provide different color pixel source class drive units that separately operating voltage is arranged, can consider that design is with many groups voltage adjuster (voltageregulator) and variable resistor combination on the input end of the system that comprises these different color pixel source class drive units.And if when needing brightness curve according to pixel and operating voltage remove to adjust voltage adjuster and variable resistor, its required configuration certainly will increase to three groups of voltage adjusters and variable-resistance combination.Therefore, this required configuration is compared with the existing line layout, and configuration area and the pairing loss power of configuration area will increase greatly, thereby causes the difficulty in the enforcement.
Figure 4 shows that the synoptic diagram of the drive unit of the solution display dispersion in the preferred embodiment of the present invention.The present invention uses a reference voltage of sharing, to reduce burden in design.This drive unit 400 is mainly a digital/analog converter 410 and constitutes.Especially, be to have a transfer function in this digital/analog converter 410, export after its received digital signal 420 can being converted to different simulating signals.
By this digital/analog converter 410, can now digital signal 420 conversions that originally provide as red pixel source class drive unit 460, green pixel source class drive unit 470 and blue pixel source class drive unit 480 co-operate voltages will be had, and digital/analog converter 410 can be converted to different analog voltage signal 430,440,450 to offer red pixel source class drive unit 460, green pixel source class drive unit 470 and blue pixel source class drive unit 480 respectively with digital signal 420 according to transfer function.
Wherein, this transfer function is by being set up according to the curve distribution figure between aanalogvoltage among Fig. 4 and pixel intensity, and in be built in the digital/analog converter 410.If this digital signal 420 with Vdata represent, transfer function with (Kr, Kg, Kb) expression, analog voltage signal 430,440,450 represents with Vr, Vg, Vb, then Vr, Vg, Vb and Vdata and (Kb) relational expression between is for Kr, Kg:
Vr＝Kr×Vdata
Vg＝Kg×Vdata
Vb＝Kb×Vdata
And,
Kr＝(Rr/Rtotal)----(1)
Kg＝(Rg/Rtotal)----(2)
Kb＝(Rb/Rtotal)----(3)
Rtotal＝Rr+Rg+Rb
(1), each subitem in (2), (3) formula can connect and can be formed by resistance, wherein Rtotal when desire designs the Kr item, can utilize the formula of following formula (1) for the summation of each subitem resistance; In like manner can demonstrate,prove, Kg, Kb can profit form in a like fashion.
Therefore, digital/analog converter 410 can be converted to the digital signal 420 of single representative operating voltage different analog voltage signal 430,440,450, and exports red pixel source class drive unit 460, green pixel source class drive unit 470 and blue pixel source class drive unit 480 to.In other words, the source of the operating voltage of red pixel source class drive unit 460, green pixel source class drive unit 470 and blue pixel source class drive unit 480 is a digital signal 420, identical for using, change replacer 410 by digital-to-analog, make red pixel source class drive unit 460, green pixel source class drive unit 470 and blue pixel source class drive unit 480 receive analog voltage signal 430,440,450 separately respectively.And these analog voltage signals 430,440,450 (red pixel source class drive unit 460, green pixel source class drive unit 470 and blue pixel source class drive unit 480 separately actual operating voltage) can make that the curve distribution of practical operation voltage and pixel intensity of red pixel source class drive unit 460, green pixel source class drive unit 470 and blue pixel source class drive unit 480 can both be consistent.
Figure 5 shows that the synoptic diagram of drive unit of the solution display dispersion of another preferred embodiment of the present invention, notion of the present invention also can be applied in electric current as on the pixel driving device that drives.In Fig. 5, this red pixel source class drive unit 560, green pixel source class drive unit 570 and blue pixel source class drive unit 580 are current drives, therefore being embodied as of correspondence of the present invention with digital/analog converter 510 processing digital signal 520, and digital signal is converted to analog current signal 530,540,550 to offer red pixel source class drive unit 560, green pixel source class drive unit 570 and blue pixel source class drive unit 580 respectively.
If digital signal 520 represents with Idata, transfer function with (Kb) expression, and analog current signal 530,540,550 represents with Ir, Ig, Ib respectively for Kr, Kg, then Ir, Ig, Ib and Idata and (Kb) relational expression between is for Kr, Kg:
Ir＝Kr×Idata
Ig＝Kg×Idata
Ib＝Kb×Idata
Comprehensively above-mentioned, a kind of solution display provided by the invention, by having transfer function in the digital/analog converter, only need use shared reference voltage source (or current source), can produce the source class drive unit that different practical operation voltage (or operating current) is given different primary colors.The virtual voltage of deriving according to transfer function can make the practical operation voltage and the relation curve between brightness of source class drive unit of different primary colors distribute and can reach unanimity, with the source class drive unit that solves different primary colors corresponding display existing chromatic dispersion problem.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (6)
1, a kind of drive unit that solves display dispersion is characterized in that, comprises
One conversion equipment, make and receive a digital signal of representing one first driving voltage, this conversion equipment is according to a transfer function and utilize a plurality of variable resistors, with the moving voltage of one second driving voltage, one the 3rd driving voltage and a 4 wheel driven that this digital signal conversion is output as simulation, and export the moving voltage of this second driving voltage, the 3rd driving voltage and this 4 wheel driven to three primary colors source class drive unit separately respectively;
Wherein, this digital signal with Vdata represent, this transfer function represents with Kr, Kg, Kb, and the moving voltage of this second driving voltage, the 3rd driving voltage and this 4 wheel driven is represented with Vr, Vg, Vb, this variable resistor represents that with Rr, Rg, Rb then the relational expression between Vr, Vg, Vb and Vdata and Kr, Kg, Kb is:
Vr＝Kr×Vdata
Vg＝Kg×Vdata
Vb＝Kb×Vdata
Kr＝(Rr/Rtotal)
Kg＝(Rg/Rtotal)
Kb＝(Rb/Rtotal)
Rtotal＝Rr+Rg+Rb。
2, the drive unit of solution display dispersion according to claim 1 is characterized in that, this transfer function is for setting up according to three primary colors operating voltage-luminosity curve map separately.
3, the drive unit of solution display dispersion according to claim 1 is characterized in that, this conversion equipment has a digital/analog converter of this transfer function in being.
4, a kind of drive unit that solves display dispersion, it is characterized in that, comprise a conversion equipment, make and receive a digital signal of representing one first drive current, this conversion equipment is according to a transfer function and utilize a plurality of variable resistors, so that the conversion of this digital signal is output as one second drive current, one the 3rd drive current and a 4 wheel driven streaming current of simulation, and export this second drive current, the 3rd drive current and this 4 wheel driven streaming current to three primary colors source class drive unit separately respectively;
Wherein, this digital signal is represented with Idata, this transfer function is represented with Kr, Kg, Kb, and this second drive current, the 3rd drive current and this 4 wheel driven streaming current are represented with Ir, Ig, Ib, this variable resistor represents that with Rr, Rg, Rb then the relational expression between Ir, Ig, Ib and Idata and Kr, Kg, Kb is:
Ir＝Kr×Idata
Ig＝Kg×Idata
Ib＝Kb×Idata
Kr＝(Rr/Rtotal)
Kg＝(Rg/Rtotal)
Kb＝(Rb/Rtotal)
Rtotal＝Rr+Rg+Rb。
5, the drive unit of solution display dispersion according to claim 4 is characterized in that, this transfer function is for setting up according to three primary colors operating voltage-luminosity curve map separately.
6, the drive unit of solution display dispersion according to claim 4 is characterized in that, this conversion equipment has a digital/analog converter of this transfer function in being.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100962008A CN100428328C (en) | 2004-12-01 | 2004-12-01 | Driving device for resolving display dispersion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100962008A CN100428328C (en) | 2004-12-01 | 2004-12-01 | Driving device for resolving display dispersion |
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| CN1783207A CN1783207A (en) | 2006-06-07 |
| CN100428328C true CN100428328C (en) | 2008-10-22 |
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| CNB2004100962008A Expired - Fee Related CN100428328C (en) | 2004-12-01 | 2004-12-01 | Driving device for resolving display dispersion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105979252A (en) * | 2015-12-03 | 2016-09-28 | 乐视致新电子科技（天津）有限公司 | Test method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4183046A (en) * | 1978-08-17 | 1980-01-08 | Interpretation Systems Incorporated | Electronic apparatus for converting digital image or graphics data to color video display formats and method therefor |
| US20030160743A1 (en) * | 2002-02-27 | 2003-08-28 | Hitoshi Yasuda | Color organic EL display device |
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- 2004-12-01 CN CNB2004100962008A patent/CN100428328C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4183046A (en) * | 1978-08-17 | 1980-01-08 | Interpretation Systems Incorporated | Electronic apparatus for converting digital image or graphics data to color video display formats and method therefor |
| US20030160743A1 (en) * | 2002-02-27 | 2003-08-28 | Hitoshi Yasuda | Color organic EL display device |
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| CN1783207A (en) | 2006-06-07 |
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