CN101996583B - Mobile phone, OLED (Organic Light Emitting Diode) display screen module and OLED display screen drive circuit - Google Patents
Mobile phone, OLED (Organic Light Emitting Diode) display screen module and OLED display screen drive circuit Download PDFInfo
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- CN101996583B CN101996583B CN2010105706982A CN201010570698A CN101996583B CN 101996583 B CN101996583 B CN 101996583B CN 2010105706982 A CN2010105706982 A CN 2010105706982A CN 201010570698 A CN201010570698 A CN 201010570698A CN 101996583 B CN101996583 B CN 101996583B
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- oled display
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides an OLED (Organic Light Emitting Diode) display screen drive circuit which comprises a drive IC (Integrated Circuit) and a switching tube, wherein the input end of the drive IC is connected with a power supply, and an output end of the drive IC is used for supplying drive voltage for an OLED display screen; and the switching tube is connected between the output end of the drive IC and the OLED display screen in series. The invention further provides the OLED display screen adopting the drive circuit and a mobile phone thereof. Through the mode, the switching tube is additionally arranged between the drive IC and the OLED display screen, which can effectively prevent the OLED display screen from having abnormally displayed bright lines during abnormal powering-off to ensure that the property of the OLED display screen is more stable.
Description
[technical field]
The present invention relates to a kind of mobile phone, particularly a kind of mobile phone, OLED display panel module and OLED display drive circuit.
[background technology]
Along with the development of science and technology, because the OLED display screen in the advantage of the aspects such as size, electric energy loss, display effect, is applied in the electronic product such as mobile phone more and more.The backlight of existing mobile phone OLED display screen needs 16V voltage, and the cell voltage of mobile phone is generally 3.2V-4.2V, needs the driving circuit of the constant voltage output of a 16V.
The OLED display drive circuit of existing mobile phone comprises drive IC (drive integrated circult) and control enable signal, when the control enable signal is significant level, drive IC is unlocked, output 16V constant voltage, be input on the OLED display screen by output voltage signal, otherwise when the control enable signal was inactive level, drive IC AP3019 was closed.Need to prove that drive IC inside there is no power cutting circuit, when it was closed, supply voltage still can arrive output terminal by its internal circuit.
OLED display backlight principle has its uniqueness, it can arrange by the register of display screen inside the intensity level of each pixel on it, the brightness that also is each pixel on the display screen is can be independently controlled, when obtaining a complete black display screen demonstration, register correctly is set each pixel brightness is closed.But mobile phone is normal open after, the register value of each pixel of display screen is normally arranged, and if at this moment directly pull out suddenly battery, the mobile phone brightness that the display screen register cuts out each pixel that also is not able to do in time correctly to arrange.Link to each other by a diode between the switch terminals of drive IC and the output terminal.When plugging battery of mobile phone, even the control enable signal is inactive level, drive IC is not unlocked, but power supply arrives output terminal by the inductance of drive IC outside and the diode of drive IC inside.After also just meaning the mobile phone abnormal power-down, again plug battery, although do not press key, the control end of backlight drive IC is inactive level, but its output terminal still has a level that is equivalent to cell voltage, and each pixel is not correctly closed when powered-off fault on the display screen, thereby just occurs the abnormal show of a bright line on the display screen.
[summary of the invention]
The embodiment of the invention provides a kind of mobile phone, a kind of OLED display screen and driving circuit thereof, makes the OLED display screen bright line of abnormal show can not occur when powered-off fault.
The embodiment of the invention provides a kind of OLED display drive circuit, and this OLED display drive circuit comprises: drive IC, and its input end is connected with power supply, and provides driving voltage by its output terminal for the OLED display screen; Switching tube is series between the output terminal and OLED display screen of drive IC.The first end of switching tube connects power supply, and the second end of switching tube connects the output terminal of drive IC, and the 3rd end of switching tube connects the OLED display screen.The OLED display drive circuit further comprises feedback circuit, the first end of feedback circuit connects the output terminal of drive IC, the second end of the second end connecting valve pipe of feedback circuit, the 3rd end ground connection of feedback circuit, the 4th end of feedback circuit connects the feedback end of drive IC.Feedback circuit comprises: the first feedback resistance, and the first end of the first feedback resistance connects the output terminal of drive IC and the second end of switching tube, and the second end of the first feedback resistance connects the feedback end of drive IC; The second feedback resistance, the first end of the second feedback resistance connects the feedback end of drive IC and the second end of the first feedback resistance, the second end ground connection of the second feedback resistance.
According to one preferred embodiment of the present invention, switching tube is the P-MOS pipe, and wherein the G utmost point of P-MOS pipe is connected in power supply, and the S utmost point of P-MOS pipe is connected in the output terminal of drive IC, and the D utmost point of P-MOS pipe is connected in the OLED display screen.
According to one preferred embodiment of the present invention, drive IC further comprises control end, and control end further connects the control enable signal, and when the control enable signal was significant level, starting drive IC provided driving voltage for the OLED display screen.
According to one preferred embodiment of the present invention, the OLED display drive circuit further comprises inductance, and the first end of inductance connects the switch terminals of drive IC, and the second end of inductance connects the input end of power supply and drive IC.
According to one preferred embodiment of the present invention, the OLED display drive circuit further comprises the first electric capacity, and the first end of the first electric capacity connects power supply, the first end of switching tube and the input end of drive IC, the second end ground connection of the first electric capacity.
The embodiment of the invention further provides a kind of OLED display panel module, and this OLED display panel module comprises in above-described embodiment each OLED display drive circuit.
The embodiment of the invention further provides a kind of mobile phone, and this mobile phone comprises OLED display panel module described above.
By the way, between drive IC and OLED display screen, add a switching tube, can prevent effectively that the bright line of abnormal show from appearring in the OLED display screen when powered-off fault, make the performance of OLED display screen more stable.
[description of drawings]
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.In addition, accompanying drawing is not proportionally drawn.
Wherein
Fig. 1 is the circuit diagram of the OLED display drive circuit of one embodiment of the invention.
[embodiment]
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
As shown in Figure 1, Fig. 1 is the circuit diagram of the OLED display drive circuit of one embodiment of the invention.The OLED display drive circuit of present embodiment comprises drive IC 10 and switching tube 30.The input end 11 of drive IC 10 is connected with power supply 20, and provides driving voltage by the output terminal 12 of drive IC 10 for OLED display screen (figure does not look).General, this driving voltage is 16V.Switching tube 30 is series between the output terminal 12 and OLED display screen of drive IC 10.Specifically, the first end 31 of switching tube 30 connects power supply 20, and the second end 32 of switching tube 30 connects the output terminal 12 of drive IC 10, and the 3rd end 33 of switching tube connects the OLED display screen.When drive IC 10 was closed, the first end 31 of switching tube 30 was suitable with the second end 32 voltages, and switching tube 30 is closed, i.e. the second end 32 of switching tube 30 and the 33 not conductings of the 3rd end, OLED display drive circuit Non voltage output.When drive IC 10 work, the first end 31 of switching tube 30 and the second end 32 voltage differences are greater than the cut-in voltage of switching tube 30, switching tube 30 conductings, i.e. the second end 32 of switching tube 30 and 33 conductings of the 3rd end, OLED display drive circuit outputting drive voltage.
As shown in Figure 1, the OLED display drive circuit further comprises feedback circuit 40.The first end of feedback circuit 40 connects the output terminal 12 of drive IC 10, the second end 32 of the second end connecting valve pipe 30 of feedback circuit 40, and the 3rd end ground connection of feedback circuit 40, the 4th end of feedback circuit 40 connects the feedback end 16 of drive IC 10.Feedback circuit 40 comprises the first feedback resistance 41 and the second feedback resistance 43.The first end of the first feedback resistance 41 connects the output terminal 12 of drive IC 10 and the feedback end 16 of the second end connection drive IC 10 of the second end 32, the first feedback resistances 41 of switching tube 30.Feedback circuit 40 can further comprise the electric capacity 42 for voltage stabilizing and filtering, and the first end of electric capacity 42 connects output terminal 12, the first end of the first feedback resistance 41 and second end 32 of switching tube 30 of drive IC 10, the second end ground connection of electric capacity 42.The first end of the second feedback resistance 43 connects the feedback end 16 of drive IC 10 and the second end of the first feedback resistance 41, and the second end ground connection of the second feedback resistance 43 also connects the second end of electric capacity 42.Feedback circuit 40 is used for the working condition of feedback drive IC 10, so that drive IC is adjusted.
As shown in Figure 1, drive IC 10 further comprises control end 13 and earth terminal 15.Control end 13 further connects control enable signal 50, and when control enable signal 50 was significant level, starting drive IC 10 provided driving voltage for the OLED display screen.Earth terminal 15 ground connection.The OLED display drive circuit further comprises inductance 60 and the first electric capacity 70.The first end of inductance 60 connects the switch terminals 14 of drive IC 10, and the second end of inductance 60 connects the input end 11 of power supply 20 and drive IC 10.The second end ground connection of the second end of the first end connection power supply 20 of the first electric capacity 70, the first end 31 of switching tube 30, inductance 60 and input end 11, the first electric capacity 70 of drive IC 10.
In one embodiment of the present invention, switching tube 30 is the P-MOS pipe.Wherein the G utmost point of P-MOS pipe is equivalent to the first end 31 of switching tube 30, is connected in power supply 20.The S utmost point of P-MOS pipe is equivalent to the second end 32 of switching tube 30, is connected in drive IC 10 output terminals 12.The D utmost point of P-MOS pipe is equivalent to the 3rd end 33 of switching tube 30, is connected in the OLED display screen.Same, when drive IC 10 was closed, voltage was suitable between the G utmost point and the S utmost point, and P-MOS manages not conducting, exports without driving voltage.When drive IC 10 work, one of IC10 output is than the high driving voltage of power supply 20 voltages, representative value 16V for example, and voltage difference is greater than the cut-in voltage Vth of P-MOS pipe between the S utmost point and the G utmost point, and P-MOS manages conducting, and driving voltage is transported to the OLED display screen.
OLED display drive circuit of the present invention can be applied in the OLED display panel module fully, is used for the OLED display screen of driving OLED display panel module.
In addition, adopt the OLED display panel module of driving circuit of the present invention also can be applied to fully in the middle of the mobile phone, as the display module of mobile phone.
By the way, the present invention adds a switching tube between drive IC and OLED display screen, can prevent effectively that the bright line of abnormal show from appearring in the OLED display screen when powered-off fault, make the performance of OLED display screen more stable.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application in the situation that does not break away from the spirit and scope of the present invention.
Claims (7)
1. OLED display drive circuit, it comprises:
Drive IC, its input end is connected with power supply, and provides driving voltage by its output terminal for the OLED display screen; It is characterized in that described OLED display drive circuit also comprises:
Switching tube, be series between the described output terminal and described OLED display screen of described drive IC, the first end of described switching tube connects described power supply, and the second end of described switching tube connects the described output terminal of described drive IC, and the 3rd end of described switching tube connects described OLED display screen;
Described OLED display drive circuit further comprises feedback circuit, the first end of described feedback circuit connects the described output terminal of described drive IC, the second end of described feedback circuit connects the second end of described switching tube, the 3rd end ground connection of described feedback circuit, the 4th end of described feedback circuit connects the feedback end of described drive IC;
Described feedback circuit comprises:
The first feedback resistance, the first end of described the first feedback resistance connect the described output terminal of described drive IC and the second end of described switching tube, and the second end of described the first feedback resistance connects the feedback end of described drive IC;
The second feedback resistance, the first end of described the second feedback resistance connect the feedback end of described drive IC and the second end of described the first feedback resistance, the second end ground connection of described the second feedback resistance.
2. OLED display drive circuit according to claim 1, it is characterized in that, described switching tube is the P-MOS pipe, the G utmost point of wherein said P-MOS pipe is connected in described power supply, the S utmost point of described P-MOS pipe is connected in the described output terminal of described drive IC, and the D utmost point of described P-MOS pipe is connected in described OLED display screen.
3. OLED display drive circuit according to claim 1, it is characterized in that, described drive IC further comprises control end, described control end further connects the control enable signal, when described control enable signal was significant level, starting described drive IC provided driving voltage for described OLED display screen.
4. OLED display drive circuit according to claim 1, it is characterized in that, described OLED display drive circuit further comprises inductance, the first end of described inductance connects the switch terminals of described drive IC, and the second end of described inductance connects the described input end of described power supply and described drive IC.
5. OLED display drive circuit according to claim 1, it is characterized in that, described OLED display drive circuit further comprises the first electric capacity, the first end of described the first electric capacity connects the first end of described power supply, described switching tube and the described input end of described drive IC, the second end ground connection of described the first electric capacity.
6. OLED display panel module, it is characterized in that: described OLED display panel module comprises such as each described OLED display drive circuit among the claim 1-5.
7. mobile phone, it is characterized in that: described mobile phone comprises OLED display panel module as claimed in claim 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105706982A CN101996583B (en) | 2010-12-02 | 2010-12-02 | Mobile phone, OLED (Organic Light Emitting Diode) display screen module and OLED display screen drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105706982A CN101996583B (en) | 2010-12-02 | 2010-12-02 | Mobile phone, OLED (Organic Light Emitting Diode) display screen module and OLED display screen drive circuit |
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| CN101996583A CN101996583A (en) | 2011-03-30 |
| CN101996583B true CN101996583B (en) | 2013-04-17 |
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| KR102381617B1 (en) | 2015-09-07 | 2022-03-31 | 삼성전자주식회사 | Method for operating semiconductor device and semiconductor system |
| CN113129844B (en) * | 2021-04-06 | 2022-08-23 | Tcl华星光电技术有限公司 | Backlight driving circuit, driving method and backlight module |
Citations (3)
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|---|---|---|---|---|
| CN101267694A (en) * | 2007-03-12 | 2008-09-17 | 徐奂 | A LED floodlight circuit driven by DC power supply under voltage increase and current constant mode |
| CN201315687Y (en) * | 2008-11-11 | 2009-09-23 | 康佳集团股份有限公司 | LED constant-current source channel protection circuit |
| CN101882424A (en) * | 2009-05-08 | 2010-11-10 | 三星电子株式会社 | Drive integrated circult and the image display device that comprises this drive integrated circult |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100905844B1 (en) * | 2007-11-15 | 2009-07-02 | 삼성전기주식회사 | Apparatus for driving light emitting element |
| CN201440747U (en) * | 2009-07-21 | 2010-04-21 | 北京诚创星光科技有限公司 | Led series drive |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267694A (en) * | 2007-03-12 | 2008-09-17 | 徐奂 | A LED floodlight circuit driven by DC power supply under voltage increase and current constant mode |
| CN201315687Y (en) * | 2008-11-11 | 2009-09-23 | 康佳集团股份有限公司 | LED constant-current source channel protection circuit |
| CN101882424A (en) * | 2009-05-08 | 2010-11-10 | 三星电子株式会社 | Drive integrated circult and the image display device that comprises this drive integrated circult |
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| CN101996583A (en) | 2011-03-30 |
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Effective date of registration: 20201229 Address after: 274200 Room 102, 1 / F, Jiahe neighborhood committee, Wenting street, Chengwu County, Heze City, Shandong Province Patentee after: Chengwu Yichang Information Technology Co.,Ltd. Address before: 511400 No.106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province (self compiled Building 1) x1301-a4845 (cluster registration) (JM) Patentee before: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Effective date of registration: 20201229 Address after: 511400 No.106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province (self compiled Building 1) x1301-a4845 (cluster registration) (JM) Patentee after: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Address before: 516006 Guangdong province Huizhou Zhongkai hi tech Development Zone No. 23 District Patentee before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |