CN104318895A - Display device control circuit - Google Patents
Display device control circuit Download PDFInfo
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- CN104318895A CN104318895A CN201410606523.0A CN201410606523A CN104318895A CN 104318895 A CN104318895 A CN 104318895A CN 201410606523 A CN201410606523 A CN 201410606523A CN 104318895 A CN104318895 A CN 104318895A
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- circuit
- oled display
- display module
- gauge tap
- control
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- 230000008901 benefit Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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Abstract
The invention belongs to the technical field of mobile terminal display devices and particularly relates to a display device control circuit. A second control switch formed by a PMOS tube and an NPN audion is arranged between a system power source and an OLED display module drive circuit and used for controlling a connecting or disconnecting state, on an OLED display module, of the system power source; accordingly, the purpose of saving power is effectively achieved, power consumption is reduced, and the use time of a mobile device is greatly prolonged.
Description
Technical field
The invention belongs to mobile terminal display device technical field, be specifically related to a kind of display device control circuit.
Background technology
Along with the development of electronic equipment, mobile terminal is seen everywhere in people's lives, the maximum feature of mobile terminal is exactly abnormal high to power consumption requirements, because user is difficult to accomplish to be charged constantly, therefore the service time of extension device is wanted, can only reduce the power consumption of mobile terminal as much as possible, this is also the pursuit of current each mobile device company.
The method reducing mobile power consumption is very many, but be nothing but software and hardware, current major part realizes with software, or software combined with hardware realizes, or adopt hardware to realize, reduce higher power dissipation ratio to be easier to realize, effect is also got instant result, but faint electric leakage is managed, substantially concentrate at present and realize with software, for mobile terminal display module, prior art adopts to turn off various no circuit, module, namely some functional module is allowed to enter dormant state, realize power saving, even if but like this, these circuit are still in "on" position, although faint undertension opens mode of operation with it, but electron device is in weak electric leakage state, weak electrical leakage problems cannot be fundamentally solved from hardware by software.
Therefore, how to solve the weak electrical leakage problems of display module as far as possible, become a great problem that those skilled in the art face.
Summary of the invention
The electrical leakage problems Problems existing under above-mentioned mobile terminal display module holding state is solved for classic method, the present invention proposes a kind of power saving type OLED display module equipment, by unlatching second gauge tap under OLED display module is in " free time " state, cutting system power supply, effectively reduce faint electric leakage, reduce power consumption.Concrete device is:
A kind of display device control circuit, it is characterized in that, described device comprises:
OLED display module;
Control circuit, is connected with described OLED display module, to control described OLED display module display image;
Driver module, is connected with described OLED display module, to drive described OLED display module luminous, is inside provided with one first gauge tap;
System power supply, is connected with described driver module by one second gauge tap;
Wherein, described control circuit has the first control pin and second and controls pin, and described first controls pin controls driver module unlatching or closedown by described first gauge tap; Described second controls pin being turned on or off by described second gauge tap control system power supply.
Foregoing circuit, wherein, described system power supply provides the DC voltage of 4V.
Foregoing circuit, wherein, described driver module inside is provided with BOOST booster circuit topology.
Foregoing circuit, wherein, the voltage that described system power supply provides is increased to 9.5V by described BOOST booster circuit topology.
Foregoing circuit, wherein, described gauge tap is made up of a PMOS and a NPN triode.
Foregoing circuit, wherein, described NPN pipe with the connected mode of described PMOS is:
The B pole of described NPN triode is connected with control circuit;
The C pole of described NPN triode is extremely connected with the G of described PMOS;
The S pole of described PMOS is connected with system power supply input;
The D pole of described PMOS is connected with the power driving circuit of described OLED display mode.
Foregoing circuit, wherein, described device also comprises:
One resistance, is arranged between the G pole of described PMOS and S pole.
Foregoing circuit, wherein, described resistance sizes is 100K.
Foregoing circuit, wherein, start described OLED display module and disconnect described OLED display module, described first control end and described second control end all have default sequential.
Foregoing circuit, wherein, described sequential is specially:
When starting described OLED display module, first control to make the first gauge tap conducting, the second gauge tap circuit turn-on when time delay is greater than after 1ms by control circuit; ;
When disconnecting described OLED display module, first control the second gauge tap circuit is disconnected by control circuit, time delay makes the first gauge tap circuit disconnect after being greater than 2ms.
Foregoing invention tool has the following advantages or beneficial effect:
The present invention is directed to the problem that OLED display module power consumption that classic method causes is larger, propose a kind of by using the on-off circuit be made up of a PMOS and a NPN triode the be turned on or off state of effective control system power supply in OLED display module, effectively reach the object of power saving, reduce power consumption, substantially prolongs the service time of mobile device.
Accompanying drawing explanation
Fig. 1 is OLED display module and control circuit functional module structure schematic diagram in prior art;
Fig. 2 is that the present invention adds OLED display module and control circuit functional module structure schematic diagram after the second gauge tap;
Fig. 3 is the power driving circuit BOOST booster circuit topology theory figure of OLED display module;
Fig. 4 is under BOOST circuit working state, the schematic diagram of the first gauge tap conducting;
Fig. 5 is under BOOST circuit working state, the schematic diagram that the first gauge tap disconnects;
Fig. 6 is that the present invention increases OLED display module and control circuit application circuit after the second gauge tap circuit;
When Fig. 7 is OLED display module disconnection, the first gauge tap, the second gauge tap open sequential chart;
When Fig. 8 is OLED display module unlatching, the first gauge tap, the second gauge tap close sequential chart.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but not as limiting to the invention.
As to an agreement of the present invention, when explain clearly pass " unlatching " time indication circuit to disconnect, that circuit wants conducting when pass of explaining clearly " closes ", when saying circuit or certain module opens, expression will be opened this modular circuit and be made this circuit turn-on, when saying circuit or certain module is closed, expression will do opening operation to described circuit, makes its no longer conducting.
For above-mentioned Problems existing, the present invention discloses and a kind of effectively reduce the device that OLED display module is in the power consumption under " free time " state, by arranging the second gauge tap in system power supply, controlling second switch when OLED display module is in " free time " state by control circuit makes the second gauge tap be in " unlatching " state, effective cutting system power supply, reduce power consumption to a great extent, extend mobile terminal OLED display module do not connect external power supply situation under service time.
Fig. 1 is the functional block diagram of conventional art, be provided with one first gauge tap, first gauge tap controls pin GPIO1 with first of control circuit and is connected, its principle is that OLED display module under " free time " state of putting is in holding state, concrete circuit diagram as shown in Figure 3, first of control circuit controls pin and is connected with the first gauge tap, effectively to control the state that the first gauge tap is in " closing " or " unlatching ", system power supply is powered to the power driving circuit of OLED display module, first gauge tap is arranged on driver module, BOOST boost topology circuit is provided with in driver module.When a defect of this functional module is wanted to close OLED display module exactly, Vout has the voltage of 3.5V effect, lights although be not enough to driving OLED, still forms electric leakage to OLED display module, adds the power consumption of system.
The specific embodiment of the present invention is:
Structure shown in Figure 2, one second gauge tap is set between system power supply and driver module, control pin GPIO2 with second of control circuit to be connected, close to control the second gauge tap when needs are turned on or off system power supply by control circuit or open.When OLED display module is in " free time " state, OLED display module passes to control circuit information, and control circuit controls pin GPIO2 by second and opens the second gauge tap, controls pin GPIO2 open the first gauge tap by first.When OLED display module need be lighted or open, OLED can pass to the information that control circuit one needs to open, and control circuit, by closed second gauge tap of the second control tube foot control, closes the first gauge tap by the first control tube foot control.
Structure shown in Figure 3, second gauge tap is made up of a Q2 NPN triode and a Q1PMOS pipe, the B that second of control circuit controls pin GPIO2 and Q2 is extremely connected, the G pole of Q1 is extremely connected with the C of Q2, the S pole of Q1 is connected with system power supply input, and the D pole of Q1 is connected with the power driving circuit of OLED display module, isolates between the G pole of Q1 and S pole with a resistance R4, preferably, the size of resistance R4 is 100K.
The power driving circuit input end of OLED display mode is extremely connected with the D of Q1, and output terminal is connected with OLED display module; Be provided with BOOST booster circuit topology in driver module, structure shown in Figure 4, booster circuit topology theory figure, comprises an inductance I
l, input capacitance C
in, output capacitance C
out, diode D, a SW
01switch, wherein C
in, C
out, SW
01be in parallel connection, SW
01the conducting of switch high level, low level disconnects.
Structural drawing shown in Figure 5, SW
01when switch closes, the 4V voltage of system power supply input flows through inductance I
l, the electric current on inductance linearly increases with certain ratio, and along with the increase of electric current, inductance stores some energy, namely completes inductance I
lcharging process.Diode D prevents electric capacity C
outdischarge over the ground, electric capacity to OLED load discharge, can only light OLED display module display screen.
Structural drawing shown in Figure 6, SW
01during switch open, due to inductance I
linterior electric current can not become 0 at once, and original circuit has disconnected, and inductance starts to electric capacity C
outcharging, electric capacity both end voltage raises, and completes boost process, exports 9.5V voltage to OLED display module.
When user needs to close OLED display module, it is high level that second of control circuit controls pin GPIO2, Q2 conducting, the C pole of Q2 is pulled to OV, and the S pole tension of Q1 is 4V, therefore Vgs=-4V, undertension is to allow Q1 conducting, and PMOS disconnects, and system power supply is also cut off.Otherwise, when user needs to open OLED display module, the C pole conducting of Q2, Vgs=4V, PMOS conducting.
When user needs close or open OLED display module, need to do an agreement, to ensure that whole circuit portions can normally work to the first time sequential routine controlling pin and the second control pin.
See Fig. 7, during closedown OLED display module, system disconnection first controls pin and second and controls pin sequential, first disconnects control circuit first and controls pin GPIO1, disconnect the second control pin GPIO2 after about 1ms again.
See Fig. 8, closed first gauge tap of system and the second gauge tap sequential during unlatching OLED display module, first Closed control circuit second controls pin GPIO2, and after 2ms, closed first controls pin GPIO1.
As a power consumption contrast, conventionally, the power of setting normal Standby is 3.5mA, and the capacity of battery is 3500mA, then the stand-by time that this mobile terminal is general is 1000h.
Use equipment of the present invention, see Fig. 7, system power supply is added the second gauge tap, power consumption is reduced, through measuring and calculating, the power consumption of same mobile terminal normal Standby is 1.5mA, same battery capacity 3500mA, the mobile terminal obtaining using apparatus of the present invention can stand-by time be 2300h, and stand-by time extends to a great extent, lower power consumption nearly 57%, benefit is obvious.
In sum, the present invention by adding second gauge tap be made up of a PMOS and a NPN pipe between system power supply and the power driving circuit of OLED display module, effectively closed or unlatching the second gauge tap in the scope that client can control, effectively reduce power consumption, extend service time when OLED display module does not connect external power supply.
It should be appreciated by those skilled in the art that those skilled in the art are realizing described change case in conjunction with prior art and above-described embodiment, do not repeat at this.Such change case does not affect flesh and blood of the present invention, does not repeat them here.
Above preferred embodiment of the present invention is described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, the equipment wherein do not described in detail to the greatest extent and structure are construed as to be implemented with the common mode in this area; Any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or being revised as the Equivalent embodiments of equivalent variations, this does not affect flesh and blood of the present invention.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs to the scope of technical solution of the present invention protection.
Claims (10)
1. a display device control circuit, is characterized in that, described circuit comprises:
OLED display module;
Control circuit, is connected with described OLED display module, to control described OLED display module display image;
Driver module, is connected with described OLED display module, to drive described OLED display module luminous, is inside provided with one first gauge tap;
System power supply, is connected with described driver module by one second gauge tap;
Wherein, described control circuit has the first control pin and second and controls pin, and described first controls pin controls driver module unlatching or closedown by described first gauge tap; Described second controls pin being turned on or off by described second gauge tap control system power supply.
2. circuit as claimed in claim 1, it is characterized in that, described system power supply provides the DC voltage of 4V.
3. circuit as claimed in claim 1, is characterized in that, described driver module inside is provided with BOOST booster circuit topology.
4. circuit as claimed in claim 3, is characterized in that, the voltage that described system power supply provides is increased to 9.5V by described BOOST booster circuit topology.
5. circuit as claimed in claim 1, it is characterized in that, described gauge tap is made up of a PMOS and a NPN triode.
6. circuit as claimed in claim 5, is characterized in that, described NPN pipe with the connected mode of described PMOS is:
The B pole of described NPN triode is connected with control circuit;
The C pole of described NPN triode is extremely connected with the G of described PMOS;
The S pole of described PMOS is connected with system power supply input;
The D pole of described PMOS is connected with the power driving circuit of described OLED display mode.
7. circuit as claimed in claim 6, it is characterized in that, described device also comprises:
One resistance, is arranged between the G pole of described PMOS and S pole.
8. circuit as claimed in claim 7, it is characterized in that, described resistance sizes is 100K.
9. circuit as claimed in claim 1, is characterized in that, start described OLED display module and disconnect described OLED display module, described first control end and described second control end all have default sequential.
10. circuit as claimed in claim 9, it is characterized in that, described sequential is specially:
When starting described OLED display module, first control to make the first gauge tap conducting, the second gauge tap circuit turn-on when time delay is greater than after 1ms by control circuit;
When disconnecting described OLED display module, first control the second gauge tap circuit is disconnected by control circuit, time delay makes the first gauge tap circuit disconnect after being greater than 2ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410606523.0A CN104318895B (en) | 2014-10-31 | 2014-10-31 | A kind of display device controls circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410606523.0A CN104318895B (en) | 2014-10-31 | 2014-10-31 | A kind of display device controls circuit |
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| CN104318895A true CN104318895A (en) | 2015-01-28 |
| CN104318895B CN104318895B (en) | 2017-09-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473068A (en) * | 2018-12-20 | 2019-03-15 | 深圳市亿境虚拟现实技术有限公司 | A kind of head-mounted display backlight black plug control circuit and control method |
| WO2020062905A1 (en) * | 2018-09-25 | 2020-04-02 | 青岛海信电器股份有限公司 | Oled display device and control method therefor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020062905A1 (en) * | 2018-09-25 | 2020-04-02 | 青岛海信电器股份有限公司 | Oled display device and control method therefor |
| CN109473068A (en) * | 2018-12-20 | 2019-03-15 | 深圳市亿境虚拟现实技术有限公司 | A kind of head-mounted display backlight black plug control circuit and control method |
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|---|---|
| CN104318895B (en) | 2017-09-01 |
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