CN104778924A - AMOLED pixel array drive display device - Google Patents
AMOLED pixel array drive display device Download PDFInfo
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- CN104778924A CN104778924A CN201510209557.0A CN201510209557A CN104778924A CN 104778924 A CN104778924 A CN 104778924A CN 201510209557 A CN201510209557 A CN 201510209557A CN 104778924 A CN104778924 A CN 104778924A
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Abstract
The invention discloses an AMOLED pixel array drive display device which comprises a matrix composed of pixel units, a scanning signal module, a data signal module, a Vdd signal module and a digital drive module. The pixel matrix is formed by connecting N rows and N columns of the pixel units symmetrically through a data signal line, a scanning signal line and a Vdd signal line. The device is characterized in that the pixel units of all columns and all rows are connected with the signal modules one by one in parallel, the signal lines are arranged orderly, and the pixel units are driven and controlled through a digital method. By means of the display device, line resistance losses caused by the fact that each signal line controls one corresponding column of pixel units can be eliminated, so that display of current driving OLEDs of each column and each row of pixels is consistent, and the effect of uniformizing display is achieved. Meanwhile, the number of pixel units which do not emit light is reduced through the digital drive light emitting method, and the service life of a pixel device is prolonged.
Description
Technical field
The invention belongs to display technique field, relate to a kind of pel array and drive display device, especially a kind of pixel array drives display device.
Background technology
Along with the development of display industry, active matrix organic light-emitting display panel (ActiveMatrix/Organic Light Emitting Diode, AMOLED) the main flow Driving technique as flat pannel display has unique advantage, and the features such as its resolution is high, fast response time, low in energy consumption, the life-span is long allow it become one of 21 century the most promising technology.But also there is shortcoming in this Driving technique, uneven and the drifting problem of threshold voltage in such as AMOLED display pixel circuits, due to the problem such as line resistance loss each pixel cell drive singal is inconsistent, AMOLED all can be caused to show uneven consequence, affect display quality.
All there are important research contents and project in each large enterprises and the colleges and universities of display industry in AMOLED, and annual related article and patent emerge in an endless stream especially.For the uneven of the threshold voltage in AMOLED display pixel circuits and drifting problem, relevant enterprise and colleges and universities have delivered with the compensating circuit structure of the NTNC (N number of TFT, N number of C) by changing pixel cell structure.But for because line resistance loss each pixel cell drive singal is inconsistent etc., problem is not solved accordingly.
As shown in Figure 1, if the connected mode that same row drive signal line does not adopt the present invention to propose, then the drive singal of the known the first row pixel cell of series system is traditionally V
dd, the drive singal of the second row pixel cell then becomes:
V
dd'＝V
dd-I
oled·R
The drive singal of the third line pixel cell is then:
V
dd”＝V
dd'-I
oled·R
......
The like, drive the V of often row pixel cell
ddsignal is also unequal.Therefore cause the inconsistent of AMOLED pixel cell drive singal, thus cause picture brightness to show uneven consequence.
Summary of the invention
The object of the invention is to the shortcoming overcoming above-mentioned prior art, provide a kind of pixel array to drive display device.
The object of the invention is to be achieved through the following technical solutions:
This pixel array drives display device, comprises the array of digital row cutting module, line scan signals generation module, sum driver module, row Vdd drive singal generation module, data voltage signal Vdata driver module and some pixel cells composition; Described line scan signals generation module is connected with the switching tube of pixel cell each in array, and row drive singal generation module is connected with the driving tube of pixel cell each in array.
Further, above-mentioned line scan signals generation module is connected with pixel cell each in array respectively with row Vdd drive singal generation module, and produces respectively by digital row cutting module and sum driver module control signal, drives corresponding pixel cell luminous.
Further, above-mentioned pixel cell comprises OLED top loaded type and OLED low-laying type two kinds of structures.
The present invention has following beneficial effect:
The each pixel cell that signal of the present invention respectively arranges with each row connects, and eliminates same row pixel cell of the prior art on same row drive signal line due to problem that line resistance consumption causes pixel cell drive singal inconsistent.Further, the present invention's numeral line driving module is driven by the method for digital drive and produces rank scanning signal, thus it is luminous to decrease unnecessary pixel cell.
Accompanying drawing explanation
Fig. 1 is that the AMOLED array of prior art drives display structure figure;
Fig. 2 is that AMOLED array of the present invention drives display device structure figure;
Fig. 3 is pixel cell OLED top loaded type structure of the present invention;
Fig. 4 is pixel cell OLED low-laying type structure of the present invention;
Wherein, T1 is switching tube, and T2 is driving tube, and Cs is electric capacity, and OLED is Organic Light Emitting Diode, and Vscan is scanning voltage signal, V
datafor voltage data signal, V
ddfor providing the supply voltage of image element circuit.
Embodiment
Of the present invention kind of pixel array drives display device, comprises the array of digital row cutting module, line scan signals generation module, sum driver module, row Vdd drive singal generation module, data voltage signal Vdata driver module and some pixel cells composition; Described line scan signals generation module is connected with the switching tube of pixel cell each in array, and row drive singal generation module is connected with the driving tube of pixel cell each in array.Described line scan signals generation module is connected with pixel cell each in array respectively with row Vdd drive singal generation module, and produces respectively by digital row cutting module and sum driver module control signal, drives corresponding pixel cell luminous.Described pixel cell comprises OLED top loaded type and OLED low-laying type two kinds of structures.
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 2: the pixel array that the present invention proposes drives in display device, line scan signals generation module and row V
dddrive singal generation module is connected with digital row cutting module and sum driver module respectively, when showing the pixel cell of certain row row, according to the mode of digital drive, corresponding ranks signal is driven to produce, as driven the pixel cell of the first row first row, then digital drive signals is respectively:
Line scan signals is 01, and row drive sweep signal to be 01, and digital total bit is wherein relevant with the sum of pixel cell in array.
Therefore the pixel cell chosen is first piece of pixel, the like, drive pixel cell module according to the mode of digital drive, thus reduce the luminous number not needing luminous pixel cell, add the life-span of device in pixel cell.
Further, as shown in Figure 3 and 4, the pixel array that the present invention proposes drives in display device, and pixel cell comprises OLED top loaded type and OLED low-laying type two kinds of structures, and two kinds of structures driving array that all can be proposed by the present invention and driver module structure.Line scanning produces signal and is connected with the switching tube in pixel cell, and row drive generation signal to be connected with the driving tube in pixel cell.
Claims (3)
1. a pixel array drives display device, it is characterized in that, comprise the array of digital row cutting module, line scan signals generation module, sum driver module, row Vdd drive singal generation module, data voltage signal Vdata driver module and some pixel cells composition; Described line scan signals generation module is connected with the switching tube of pixel cell each in array, and row drive singal generation module is connected with the driving tube of pixel cell each in array.
2. pixel array according to claim 1 drives display device, it is characterized in that, described line scan signals generation module is connected with pixel cell each in array respectively with row Vdd drive singal generation module, and produce respectively by digital row cutting module and sum driver module control signal, drive corresponding pixel cell luminous.
3. pixel array according to claim 1 drives display device, and it is characterized in that, described pixel cell comprises OLED top loaded type and OLED low-laying type two kinds of structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510209557.0A CN104778924A (en) | 2015-04-28 | 2015-04-28 | AMOLED pixel array drive display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510209557.0A CN104778924A (en) | 2015-04-28 | 2015-04-28 | AMOLED pixel array drive display device |
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| Publication Number | Publication Date |
|---|---|
| CN104778924A true CN104778924A (en) | 2015-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510209557.0A Pending CN104778924A (en) | 2015-04-28 | 2015-04-28 | AMOLED pixel array drive display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018036085A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳市华星光电技术有限公司 | Oled pwm digital driving method and circuit |
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| CN101976546A (en) * | 2010-10-19 | 2011-02-16 | 友达光电股份有限公司 | Pixel circuits with power voltage drop compensation functions and luminous panel |
| CN102054427A (en) * | 2009-11-03 | 2011-05-11 | 上海天马微电子有限公司 | Display device and driving method thereof |
| CN102819996A (en) * | 2011-06-08 | 2012-12-12 | 索尼公司 | Pixel circuit, display device, electronic device, and pixel circuit driving method |
| CN103854601A (en) * | 2012-12-04 | 2014-06-11 | 三星显示有限公司 | Display device and driving method thereof |
| CN204577058U (en) * | 2015-04-28 | 2015-08-19 | 陕西科技大学 | A kind of pixel array drives display device |
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2015
- 2015-04-28 CN CN201510209557.0A patent/CN104778924A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| CN101916544A (en) * | 2006-04-13 | 2010-12-15 | 出光兴产株式会社 | Electro-optical device |
| CN102054427A (en) * | 2009-11-03 | 2011-05-11 | 上海天马微电子有限公司 | Display device and driving method thereof |
| CN101976546A (en) * | 2010-10-19 | 2011-02-16 | 友达光电股份有限公司 | Pixel circuits with power voltage drop compensation functions and luminous panel |
| CN102819996A (en) * | 2011-06-08 | 2012-12-12 | 索尼公司 | Pixel circuit, display device, electronic device, and pixel circuit driving method |
| CN103854601A (en) * | 2012-12-04 | 2014-06-11 | 三星显示有限公司 | Display device and driving method thereof |
| CN204577058U (en) * | 2015-04-28 | 2015-08-19 | 陕西科技大学 | A kind of pixel array drives display device |
Cited By (1)
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| WO2018036085A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳市华星光电技术有限公司 | Oled pwm digital driving method and circuit |
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Application publication date: 20150715 |
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| RJ01 | Rejection of invention patent application after publication |