CN201897945U - Mobile phone, OLED display screen module and OLED display screen drive circuit - Google Patents
Mobile phone, OLED display screen module and OLED display screen drive circuit Download PDFInfo
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- CN201897945U CN201897945U CN2010206389947U CN201020638994U CN201897945U CN 201897945 U CN201897945 U CN 201897945U CN 2010206389947 U CN2010206389947 U CN 2010206389947U CN 201020638994 U CN201020638994 U CN 201020638994U CN 201897945 U CN201897945 U CN 201897945U
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- oled display
- drive
- display screen
- drive circuit
- feedback
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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 utility model provides an OLED (Organic Light Emitting Diode) display screen drive circuit, which is characterized by comprising a drive IC and a switch tube, wherein the input end of the drive IC is connected with a power supply; the output end of the drive IC provides driving voltage for an OLED display screen; and the switch tube is connected in series between the output end of the drive IC and the OLED display screen. The utility model further provides an OLED display screen adopting the drive circuit and a mobile phone adopting the OLED display screen. By adopting the scheme, since the switch tube is additionally arranged between the drive IC and the OLED display screen, a bright line representing an abnormal display on the OLED display screen can be effectively prevented in case of abnormal power down, and the performance of the OLED display screen is more stable.
Description
[technical field]
The utility model 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 continuous development of science and technology, because the OLED display screen in the advantage of 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 be provided with the intensity level of each pixel on it by the register of display screen inside, the brightness that also is each pixel on the display screen is can be independently controlled, when obtaining a display screen demonstration of deceiving entirely, register correctly is set each pixel brightness all is closed.But mobile phone is normal open after, the register value of each pixel of display screen normally is provided with, and if at this moment directly pull out battery suddenly, the mobile phone brightness that the display screen register cuts out each pixel that also is not able to do in time correctly to be provided with.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 an 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, though not by the start key, the control end of backlight drive IC is an 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.
[utility model content]
The utility model embodiment 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 utility model embodiment 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.
According to the utility model one preferred embodiment, first end of switching tube connects power supply, and second end of switching tube connects the output terminal of drive IC, and the 3rd end of switching tube connects the OLED display screen.
According to the utility model one preferred embodiment, 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 the utility model one preferred embodiment, the OLED display drive circuit further comprises feedback circuit, first end of feedback circuit connects the output terminal of drive IC, second end of feedback circuit connects second end of switching tube, the 3rd end ground connection of feedback circuit, the 4th end of feedback circuit connects the feedback end of drive IC.
According to the utility model one preferred embodiment, feedback circuit comprises: first feedback resistance, and first end of first feedback resistance connects the output terminal of drive IC and second end of switching tube, and second end of first feedback resistance connects the feedback end of drive IC; Second feedback resistance, first end of second feedback resistance connects the feedback end of drive IC and second end of first feedback resistance, the second end ground connection of second feedback resistance.
According to the utility model one preferred embodiment, 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 the utility model one preferred embodiment, the OLED display drive circuit further comprises inductance, and first end of inductance connects the switch terminals of drive IC, and second end of inductance connects the input end of power supply and drive IC.
According to the utility model one preferred embodiment, the OLED display drive circuit further comprises first electric capacity, and first end of first electric capacity connects power supply, first end of switching tube and the input end of drive IC, the second end ground connection of first electric capacity.
The utility model embodiment further provides a kind of OLED display panel module, and this OLED display panel module comprises in the foregoing description each OLED display drive circuit.
The utility model embodiment further provides a kind of mobile phone, and this mobile phone comprises as above-mentioned OLED display panel module.
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 among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.In addition, accompanying drawing is not proportionally drawn.Wherein
Fig. 1 is the circuit diagram of the OLED display drive circuit of the utility model one embodiment.
[embodiment]
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, Fig. 1 is the circuit diagram of the OLED display drive circuit of the utility model one embodiment.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, first end 31 of switching tube 30 connects power supply 20, and 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, first end 31 of switching tube 30 was suitable with second end, 32 voltages, and switching tube 30 is closed, i.e. second end 32 of switching tube 30 and the 33 not conductings of the 3rd end, the output of OLED display drive circuit no-voltage.When drive IC 10 work, first end 31 of switching tube 30 and second end, 32 voltage differences are greater than the cut-in voltage of switching tube 30, switching tube 30 conductings, i.e. 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.First end of feedback circuit 40 connects the output terminal 12 of drive IC 10, and second end of feedback circuit 40 connects second end 32 of switching tube 30, the 3rd end ground connection of feedback circuit 40, and the 4th end of feedback circuit 40 connects the feedback end 16 of drive IC 10.Feedback circuit 40 comprises first feedback resistance 41 and second feedback resistance 43.First end of first feedback resistance 41 connects the output terminal 12 of drive IC 10 and the feedback end 16 of second end connection drive IC 10 of second end, 32, the first feedback resistances 41 of switching tube 30.Feedback circuit 40 can further comprise the electric capacity 42 that is used for voltage stabilizing and filtering, and first end of electric capacity 42 connects output terminal 12, first end of 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.First end of second feedback resistance 43 connects the feedback end 16 of drive IC 10 and second end of first feedback resistance 41, and the second end ground connection of second feedback resistance 43 also connects second end of electric capacity 42.Feedback circuit 40 is used to feed back the working condition of 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 the inductance 60 and first electric capacity 70.First end of inductance 60 connects the switch terminals 14 of drive IC 10, and second end of inductance 60 connects the input end 11 of power supply 20 and drive IC 10.The second end ground connection of second end of first end connection power supply 20 of first electric capacity 70, first end 31 of switching tube 30, inductance 60 and input end 11, the first electric capacity 70 of drive IC 10.
In the utility model one preferred embodiment, switching tube 30 is the P-MOS pipe.Wherein the G utmost point of P-MOS pipe is equivalent to first end 31 of switching tube 30, is connected in power supply 20.The S utmost point of P-MOS pipe is equivalent to 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, no driving voltage output.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 utility model 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 the utility model driving circuit also can be applied to fully in the middle of the mobile phone, as the display module of mobile phone.
By the way, the utility model 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 utility model has been carried out exemplary description, but those skilled in the art can carry out various modifications to the utility model after reading present patent application under the situation that does not break away from spirit and scope of the present utility model.
Claims (10)
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 described OLED display screen; It is characterized in that described OLED display drive circuit also comprises:
Switching tube is series between the described output terminal and described OLED display screen of described drive IC.
2. OLED display drive circuit according to claim 1, it is characterized in that, first end of described switching tube connects described power supply, and 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.
3. OLED display drive circuit according to claim 2, 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 described output terminal, and the D utmost point of described P-MOS pipe is connected in described OLED display screen.
4. OLED display drive circuit according to claim 2, it is characterized in that, described OLED display drive circuit further comprises feedback circuit, first end of described feedback circuit connects the output terminal of described drive IC, second end of described feedback circuit connects 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.
5. OLED display drive circuit according to claim 4 is characterized in that, described feedback circuit comprises:
First feedback resistance, first end of described first feedback resistance connect the output terminal of described drive IC and second end of described switching tube, and second end of described first feedback resistance connects the feedback end of described drive IC;
Second feedback resistance, first end of described second feedback resistance connect the feedback end of described drive IC and second end of described first feedback resistance, the second end ground connection of described second feedback resistance.
6. 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.
7. OLED display drive circuit according to claim 1, it is characterized in that, described OLED display drive circuit further comprises inductance, and first end of described inductance connects the switch terminals of described drive IC, and second end of described inductance connects the input end of described power supply and described drive IC.
8. OLED display drive circuit according to claim 1, it is characterized in that, described OLED display drive circuit further comprises first electric capacity, first end of described first electric capacity connects first end of described power supply, described switching tube and the input end of described drive IC, the second end ground connection of described first electric capacity.
9. OLED display panel module, it is characterized in that: described OLED display panel module comprises as each described OLED display drive circuit among the claim 1-8.
10. mobile phone, it is characterized in that: described mobile phone comprises OLED display panel module as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206389947U CN201897945U (en) | 2010-12-02 | 2010-12-02 | Mobile phone, OLED display screen module and OLED display screen drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206389947U CN201897945U (en) | 2010-12-02 | 2010-12-02 | Mobile phone, OLED display screen module and OLED display screen drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201897945U true CN201897945U (en) | 2011-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206389947U Expired - Lifetime CN201897945U (en) | 2010-12-02 | 2010-12-02 | Mobile phone, OLED display screen module and OLED display screen drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201897945U (en) |
-
2010
- 2010-12-02 CN CN2010206389947U patent/CN201897945U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110713 Effective date of abandoning: 20130417 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20110713 Effective date of abandoning: 20130417 |
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| RGAV | Abandon patent right to avoid regrant |