CN100435349C - Active organic LED panel and control method thereof - Google Patents
Active organic LED panel and control method thereof Download PDFInfo
- Publication number
- CN100435349C CN100435349C CNB2006101377072A CN200610137707A CN100435349C CN 100435349 C CN100435349 C CN 100435349C CN B2006101377072 A CNB2006101377072 A CN B2006101377072A CN 200610137707 A CN200610137707 A CN 200610137707A CN 100435349 C CN100435349 C CN 100435349C
- Authority
- CN
- China
- Prior art keywords
- size
- temperature sensor
- organic led
- active organic
- led panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses an active organic LED panel and the control method thereof. And it comprises a pixel array, temperature sensor and feedback control circuit, where the temperature sensor detects its operating temperature; and the feedback control circuit regulates its operating current according to the sensed result of the temperature sensor. And its operating current amplitude is in inverse proportion to the sensed operating temperature amplitude, mainly avoiding it is on high temperature and heavy current conditions, and prolonging its service life.
Description
Technical field
The present invention relates to a kind of active organic LED panel, particularly relate to a kind of adjustment operating current and control the active organic LED panel method of temperature.
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) panel has advantages such as fast-response time, the restriction of in light weight, no visual angle, high-contrast with respect to display panels, thereby becomes one of main research focus of display floater in recent years.Type of drive according to Organic Light Emitting Diode, can be divided into passive Organic Light Emitting Diode (Passive Matrix Organic Light Emitting Diode haply, PMOLED) panel and active organic LED (Active Matrix Organic Light EmittingDiode, AMOLED) panel.Wherein, the AMOLED panel is applicable to high-resolution and large-sized display floater.
Because the brightness of AMOLED panel pixels is proportional to the conducting electric current of Organic Light Emitting Diode, and the size of this conducting electric current is to be determined by transistor.When the working temperature of AMOLED panel continues to increase, transistorized starting voltage can reduce gradually, the electric current that makes the transistor drain end produce can increase, and the anode tap of light-emitting diode and transistor drain end couple again, so the electric current of the Organic Light Emitting Diode of flowing through also can increase.Yet the AMOLED panel contains great variety of organic, under the situation of high temperature, high electric current, easily makes AMOLED panel accelerated deterioration, also can shorten the useful life of panel simultaneously.
Figure 1 shows that under different temperature the trend of the whole drive current of existing panel.Please refer to Fig. 1, in existing technology, along with the AMOLED panel temperature improves, its drive current also can increase thereupon, and promptly the temperature of AMOLED panel and drive current are a proportional relation.This expression is along with the temperature of AMOLED panel raises, and the electric current of the Organic Light Emitting Diode of flowing through also can become greatly, makes that the AMOLED panel can accelerated deterioration and reduction of service life.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of flat-panel monitor and its AMOLED panel, variation of temperature in the time of can operating according to it, and the size of adjustment operating current.
From another viewpoint, the purpose of this invention is to provide a kind of control method of AMOLED panel, can control the drive current size of AMOLED panel and the size of its working temperature and be inverse ratio.
AMOLED panel provided by the invention comprises a pel array, a temperature sensor and a feedback control circuit.Wherein, pel array has a plurality of pixel cells with arrayed, and temperature sensor then is the working temperature that is used for detecting to the pixel cell of small part.By this, feedback control circuit just can be adjusted the size of the operating current of pel array according to temperature sensor institute sensed result.In the present invention, feedback control circuit can be controlled the size of operating current of pel array and the size of the working temperature that temperature sensor is detected is inverse ratio; Wherein this feedback control circuit is data voltage or the common voltage that the size of the working temperature that detects according to this temperature sensor is adjusted described pixel cell, so that the size of the working temperature that the size of the operating current of this pel array and this temperature sensor are detected is inverse ratio.
From another viewpoint, the invention provides a kind of flat-panel monitor, comprise an AMOLED panel, a temperature sensor and a feedback control circuit.Wherein, the AMOLED panel has a plurality of pixel cells, and temperature sensor is the working temperature that is used for detecting the AMOLED panel.In addition, feedback control circuit can be adjusted the operating current size of AMOLED panel according to temperature sensor institute sensed result.In the present invention, the size of the working temperature that detected of the feedback control circuit operating current size that can control the AMOLED panel and temperature sensor is inverse ratio; Wherein this feedback control circuit is data voltage or the common voltage that the size of the working temperature that detects according to this temperature sensor is adjusted described pixel cell, so that the size of the working temperature that the size of the operating current of this pel array and this temperature sensor are detected is inverse ratio.
From another viewpoint, the invention provides a kind of control method of AMOLED panel.At first utilize temperature sensor to detect the working temperature of the subregion at least of AMOLED panel, and testing result is sent to feedback control circuit, then feedback control circuit is adjusted the operating current size of AMOLED panel according to testing result, makes the size of operating current of AMOLED panel and the size of working temperature be inverse ratio; This feedback control circuit is adjusted the data voltage or the common voltage of pixel cell according to this testing result, so that the size of the working temperature of the size of the operating current of this active organic LED panel and institute's surveyed area is inverse ratio.
Because the present invention utilizes temperature sensor to detect the working temperature of AMOLED panel, the big or small size with working temperature of operating current of adjusting the AMOLED panel according to the working temperature that temperature sensor detected by feedback control circuit is inverse ratio again.By this, when the AMOLED panel when working temperature increases, the conducting electric current of Organic Light Emitting Diode but can reduce, and prolongs the useful life of panel.
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 the relation of the prior art of active organic LED panel drive current and temperature;
Fig. 2 is the circuit block diagram according to a kind of active organic LED panel of a preferred embodiment of the present invention;
Fig. 3 is the pixel unit circuit figure according to a preferred embodiment of the present invention;
Fig. 4 is the relation of active organic LED panel drive current of the present invention and temperature;
Fig. 5 is the circuit block diagram according to a kind of active organic LED panel of another preferred embodiment of the present invention.
Wherein, Reference numeral:
200 flat-panel monitors
210 AMOLED panels
212 temperature sensors
214 feedback control circuits
220 scan line drive circuits
222 data line drive circuits
224 pel arrays
228 pixel cells
2281 pixel cells
230 scan lines
234 data wires
310,312 transistors
320 Organic Light Emitting Diodes
Embodiment
Figure 2 shows that circuit block diagram according to a kind of active organic electroluminescent display device of a preferred embodiment of the present invention.Please refer to Fig. 2, the invention provides flat-panel monitor 200, comprise AMOLED panel 210, temperature sensor 212 and feedback control circuit 214.Wherein, temperature sensor 212 is configured on the AMOLED panel 210, the working temperature when being used for detecting 210 runnings of AMOLED panel, and the result that will detect delivers to feedback control circuit 214.
Figure 3 shows that circuit diagram, go for the pixel cell 228 of Fig. 2 according to a kind of pixel cell 2281 of a preferred embodiment of the present invention.Please refer to Fig. 3, pixel cell 2281 comprises transistor 310 and 312 and Organic Light Emitting Diode 320.In the present embodiment, transistor 310 and 312 can utilize NMOS (N-Type Metal Oxide Semiconductor, N type metal oxide semiconductor) transistor to realize.Wherein, the gate terminal of transistor 310 is coupled to one scan line 230, and source terminal is coupled to a data wire 234, and drain electrode end is coupled to the gate terminal of driving transistors 312.In addition, the source terminal of transistor 312 is coupled to a voltage source V
DD, drain electrode end is coupled to the anode tap of Organic Light Emitting Diode 320, and is coupled to a common voltage Vss by the cathode terminal of Organic Light Emitting Diode 320.In an embodiment of the present invention, common voltage Vss can be an earthing potential.
Please merge with reference to Fig. 2 and Fig. 3, in Fig. 2, scan line drive circuit 220 is to be used for producing sweep signal, and data line drive circuit 222 is to be used for producing data voltage.In the time will driving pixel cell 2281, at first the sweep signal activation on scan line drive circuit 220 scan line 230 that pixel cell 2281 can be coupled makes transistor 310 be switched on.At this moment, data line drive circuit 222 can be exported a data voltage signal, and delivers to pixel cell 2281 by data wire 234, and is sent to the grid of driving transistors 312 by transistor 310.By this, transistor 312 can be activated, and produces a drive current I
DDrive Organic Light Emitting Diode 320.
Can learn drive current I from Fig. 3
DSize and data voltage, operating voltage and common voltage all relevant.Therefore, the present invention utilizes these characteristics to adjust the size of drive current.
Please merge with reference to Fig. 2 and Fig. 3, in Fig. 2, after AMOLED panel 210 was worked a period of times, its working temperature can continue to rise.If temperature sensor 212 detects the working temperature of the partial pixel unit of AMOLED panel 210 when raising, feedback control circuit 214 can reduce data voltages by data line drive circuit 222.At this moment, the gate terminal voltage of transistor 312 also can reduce, and makes the operating voltage of transistor 312 reduce.Because the operating voltage of transistor 312 reduces, so the drive current I that produces by transistor 312
DDiminish, so that the drive current I of the light-emitting diode of flowing through
DReduce.
Figure 4 shows that under different temperature the trend of the whole drive current of panel of the present invention.Please refer to Fig. 4, feedback control circuit 214 meetings among Fig. 2 are according to the testing result of temperature sensor 212, and the size of the working temperature of the size of the operating current of control AMOLED panel and institute's surveyed area is inverse ratio.Therefore, when the working temperature of AMOLED panel rises, drive current I
DThen decrease, can also can prolong the useful life of panel simultaneously so that the AMOLED panel is difficult for accelerated deterioration.
Figure 5 shows that circuit block diagram according to a kind of active organic electroluminescent display device of another preferred embodiment of the present invention.Please refer to Fig. 5, the invention provides flat-panel monitor 200, comprise AMOLED panel 210, temperature sensor 212 and feedback control circuit 214.Wherein, temperature sensor 212 is configured on the AMOLED panel 210, the working temperature when being used for detecting 210 runnings of AMOLED panel, and the result that will detect delivers to feedback control circuit 214.
Please merge with reference to Fig. 2 and Fig. 3, in Fig. 2, after AMOLED panel 210 was worked a period of times, its working temperature can continue to rise.If temperature sensor 212 detects the working temperature of the partial pixel unit of AMOLED panel 210 when raising, feedback control circuit 212 can downgrade the operating voltage V of transistor 312
DDIn Fig. 3, because the operating voltage V of transistor 312
DDReduce, make operating voltage V
DDAnd the voltage difference between the common voltage Vss is apart from dwindling, so that the drive current I that transistor 312 produces
DAlso can reduce.Therefore, the drive current I of Organic Light Emitting Diode
DAlso and then reduce, make that the AMOLED panel can accelerated deterioration, also can prolong the useful life of AMOLED panel simultaneously.
In sum, propose to utilize temperature sensor to detect the working temperature of AMOLED panel in the present invention, and according to temperature sensor institute sensed result, the size of adjusting the working temperature that operating current and temperature sensor detected of AMOLED panel by feedback control circuit is inverse ratio.Therefore, when the AMOLED panel was at high temperature operated, its operating current can descend thereupon, made AMOLED panel of the present invention be difficult for deterioration, and prolonged the useful life of panel.
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 range of the appended claim of the present invention.
Claims (9)
1, a kind of active organic LED panel is characterized in that, comprising:
One pel array has a plurality of pixel cells with arrayed;
One temperature sensor is used to detect the working temperature to small part of described pixel cell; And
One feedback control circuit according to this temperature sensor institute sensed result, and is adjusted the operating current size of this pel array,
Wherein this feedback control circuit is the data voltage that the size adjustment of the working temperature that detects according to this temperature sensor is input to described pixel cell, so that the size of the working temperature that the size of the operating current of this pel array and this temperature sensor are detected is inverse ratio.
2, active organic LED panel according to claim 1 is characterized in that, described each pixel cell comprises:
One first nmos pass transistor, its source terminal receives described data voltage, and its gate terminal then receives the one scan signal;
One second nmos pass transistor, its source terminal couples an operating voltage, and its gate terminal then couples the drain electrode end of this first nmos pass transistor; And
One Organic Light Emitting Diode assembly, its anode tap couples the drain electrode end of this second nmos pass transistor, and its cathode terminal then couples a common voltage.
3, active organic LED panel according to claim 2 is characterized in that, the current potential of this common voltage is an earthing potential.
4, a kind of active organic LED panel is characterized in that, comprising:
One pel array has a plurality of pixel cells with arrayed;
One temperature sensor is used to detect the working temperature to small part of described pixel cell; And
One feedback control circuit according to this temperature sensor institute sensed result, and is adjusted the operating current size of this pel array,
Wherein this feedback control circuit is the common voltage that the size of the working temperature that detects according to this temperature sensor is adjusted described pixel cell, is inverse ratio with the size of the operating current of controlling this pel array and the size of the working temperature that this temperature sensor is detected.
5, a kind of flat-panel monitor is characterized in that, comprising:
One active organic LED panel has a plurality of pixel cells, is to arrange with array way;
One temperature sensor is used to detect the working temperature of this active organic LED panel; And
One feedback control circuit according to this temperature sensor institute sensed result, and is adjusted the operating current size of this active organic LED panel,
Wherein this feedback control circuit is the data voltage that the size adjustment of the working temperature that detects according to this temperature sensor is input to described pixel cell, so that the size of the working temperature that the size of the operating current of this active organic LED panel and this temperature sensor are detected is inverse ratio.
6, flat-panel monitor according to claim 5 is characterized in that, described each pixel cell comprises:
One first nmos pass transistor, its source terminal receives described data voltage, and its gate terminal then receives the one scan signal;
One second nmos pass transistor, its source terminal couples an operating voltage, and its gate terminal then couples the drain electrode end of this first nmos pass transistor; And
One Organic Light Emitting Diode assembly, its anode tap couples the drain electrode end of this second nmos pass transistor, and its cathode terminal then couples a common voltage.
7, flat-panel monitor according to claim 6 is characterized in that, the current potential of this common voltage is an earthing potential.
8, a kind of flat-panel monitor is characterized in that, comprising:
One active organic LED panel has a plurality of pixel cells, is to arrange with array way;
One temperature sensor is used to detect the working temperature of this active organic LED panel; And
One feedback control circuit according to this temperature sensor institute sensed result, and is adjusted the operating current size of this active organic LED panel,
Wherein this feedback control circuit is the common voltage that the size of the working temperature that detects according to this temperature sensor is adjusted described pixel cell, is inverse ratio with the size of the operating current of controlling this pel array and the size of the working temperature that this temperature sensor is detected.
9, a kind of control method of active organic LED panel is characterized in that, comprises the following steps:
Detect the working temperature of the subregion at least of this active organic LED panel, and produce a testing result; And
Adjust the data voltage or the common voltage of pixel cell according to this testing result, so that the size of the working temperature of the size of the operating current of this active organic LED panel and institute's surveyed area is inverse ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101377072A CN100435349C (en) | 2006-10-26 | 2006-10-26 | Active organic LED panel and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101377072A CN100435349C (en) | 2006-10-26 | 2006-10-26 | Active organic LED panel and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1949943A CN1949943A (en) | 2007-04-18 |
| CN100435349C true CN100435349C (en) | 2008-11-19 |
Family
ID=38019280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101377072A Active CN100435349C (en) | 2006-10-26 | 2006-10-26 | Active organic LED panel and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100435349C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100999760B1 (en) * | 2008-09-26 | 2010-12-08 | 엘지이노텍 주식회사 | Lighting emitting device package and fabrication method thereof |
| KR101142702B1 (en) * | 2010-05-06 | 2012-05-03 | 삼성모바일디스플레이주식회사 | Organic light emitting display and driving method using the same |
| KR101442680B1 (en) * | 2012-10-15 | 2014-09-19 | 엘지디스플레이 주식회사 | Apparatus and method for driving of organic light emitting display device |
| CN104535913B (en) * | 2015-01-12 | 2017-12-19 | 华南师范大学 | The heat testing method and test system of LED component with built-in temperature detection |
| CN106910461B (en) * | 2017-05-11 | 2020-12-22 | 京东方科技集团股份有限公司 | Display panel, display device and display driving method |
| CN108447442A (en) * | 2018-03-20 | 2018-08-24 | 京东方科技集团股份有限公司 | The control method of display device and display device |
| CN109360522A (en) * | 2018-12-10 | 2019-02-19 | 上海天马有机发光显示技术有限公司 | A kind of driving method and display device of display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050007320A1 (en) * | 2001-10-31 | 2005-01-13 | Smith Euan C. | Display drivers |
| CN1750098A (en) * | 2005-10-20 | 2006-03-22 | 友达光电股份有限公司 | Driving circuit and driving method |
-
2006
- 2006-10-26 CN CNB2006101377072A patent/CN100435349C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050007320A1 (en) * | 2001-10-31 | 2005-01-13 | Smith Euan C. | Display drivers |
| CN1750098A (en) * | 2005-10-20 | 2006-03-22 | 友达光电股份有限公司 | Driving circuit and driving method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1949943A (en) | 2007-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107016965B (en) | The compensation method of the OVSS voltage drop of OLED display and pixel-driving circuit | |
| US20200243014A1 (en) | Display panel and driving method of pixel circuit | |
| CN100435349C (en) | Active organic LED panel and control method thereof | |
| JP5258160B2 (en) | Image display device | |
| US9324267B2 (en) | Organic light emitting display and driving method thereof | |
| CN103165079B (en) | Organic light-emitting display device and method of operating thereof | |
| KR101209055B1 (en) | Display device and driving method thereof | |
| CN1249658C (en) | Indicator | |
| CN1253841C (en) | Self luminous display device | |
| JP5080248B2 (en) | Image display device | |
| CN108492783B (en) | Pixel driving circuit of AMOLED display device and driving method of AMOLED display device | |
| US8378933B2 (en) | Pixel and organic light emitting display device using the same | |
| CN101833916B (en) | Pixel drive circuit of a luminous display panel | |
| US20040041525A1 (en) | Organic electro-luminescence device and method and apparatus for driving the same | |
| CN107452329B (en) | Organic light emitting diode display and driving method thereof | |
| CN101551970B (en) | Light-emitting device, display device and drive control method for light-emitting device | |
| CN1284128C (en) | Self-luminous display | |
| EP1450345A2 (en) | Active drive type light emitting display device and drive control method thereof | |
| US9275573B2 (en) | Display apparatus | |
| CN103377618B (en) | Display device and the driving method for display device | |
| KR20070059403A (en) | Display device and driving method thereof | |
| US20210335254A1 (en) | Display device and driving method thereof | |
| CN108604433A (en) | A kind of pixel circuit and its driving method, display device | |
| US10699655B2 (en) | Display device, display panel, driving method, and gate driver circuit | |
| KR20140021292A (en) | Thin film transistor and organic light emitting display comprising the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |