CN101673511B - Organic light emitting display device with power saving function - Google Patents
Organic light emitting display device with power saving function Download PDFInfo
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- CN101673511B CN101673511B CN200910210142XA CN200910210142A CN101673511B CN 101673511 B CN101673511 B CN 101673511B CN 200910210142X A CN200910210142X A CN 200910210142XA CN 200910210142 A CN200910210142 A CN 200910210142A CN 101673511 B CN101673511 B CN 101673511B
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Abstract
An organic light emitting display device with a power saving function comprises a first power module for generating a first source voltage, a second power module for generating a second source voltage, a grid drive circuit for generating a scanning signal, a data drive circuit for generating a data signal, a pixel circuit, a ripple wave detection unit and a processing unit. The ripple wave detection unit is used for detecting ripple wave of the first source voltage so as to generate a detection voltage; the processing unit generates a power saving control signal according to the detection voltage; and the pixel circuit controls light emitting drive operation based on voltage difference between the first source voltage and the second source voltage according to the scanning signal and the data signal. The first power module adjusts the first source voltage to reduce the voltage difference when the power saving control signal is more than a critical value, thus reducing power consumption.
Description
Technical field
The present invention relates to a kind of organic light-emitting display device, refer to a kind of organic light-emitting display device especially with electricity-saving function.
Background technology
Flat display apparatus (Flat Panel Display) has that external form is frivolous, power saving and advantage such as radiationless, so be widely used on the electronic products such as computer screen, mobile phone, PDA(Personal Digital Assistant), flat-surface television.In various flat display apparatus, active matrix organic light-emitting display device (ActiveMatrix Organic Light Emitting Display; AMOLED) but have more fast, wide viewing angle of autoluminescence, high brightness, high-luminous-efficiency, high contrast, reaction time and serviceability temperature scope further advantage such as big, therefore highly competititve on the market of flat display apparatus.
Fig. 1 is the structural representation of known active matrix organic light-emitting display device.As shown in Figure 1, active matrix organic light-emitting display device 100 comprises gate driver circuit 110, data drive circuit 120, a plurality of image element circuit 150 and power supply unit 160.Each image element circuit 150 comprises the first transistor 151, transistor seconds 152, storage capacitors 153 and Organic Light Emitting Diode (Organic Light Emitting Diode; OLED) 154.Power supply unit 160 is used to provide the first supply voltage Vdd and second source voltage Vss is fed into each image element circuit 150.Gate driver circuit 110 is used to provide a plurality of sweep signals and a plurality of data-signal respectively with data drive circuit 120.Each image element circuit 150 promptly according to corresponding sweep signal and corresponding data signal controlling based on the pressure reduction of the first supply voltage Vdd and second source voltage Vss light emitting drive operation to Organic Light Emitting Diode 154.Yet, because Organic Light Emitting Diode 154 is the current drives assembly, so when active matrix organic light-emitting display device 100 exhibit high brilliance images, power supply unit 160 needs the big electric current of supply to drive a plurality of Organic Light Emitting Diodes 154, so can cause high power consumption and improve panel temperature, and then reduction panel serviceable life.
Summary of the invention
The technical matters that the present invention solves is, a kind of organic light-emitting display device with electricity-saving function is provided, the effect of saving power consumption when being implemented in exhibit high brilliance and influence.
Technical solution of the present invention is:
A kind of organic light-emitting display device with electricity-saving function, wherein, this organic light-emitting display device comprises:
One gate driver circuit is used to provide the one scan signal;
One data drive circuit is used to provide a data-signal;
The one scan line is electrically connected on this gate driver circuit, is used for transmitting this sweep signal;
One data line is electrically connected on this data drive circuit, is used for transmitting this data-signal;
One first power supply module, be used for producing one first supply voltage, this first power supply module comprises: a transistor, a power supply output unit and a pulse wave width modulation signal generation unit, this transistor comprises one first end, one second end and a gate terminal, wherein this first end is used for receiving a direct current input voltage, and gate terminal is used for receiving a pulse wave width modulation signal; This power supply output unit is electrically connected on one first power lead and this transistorized second end, is used for exporting this first supply voltage; This pulse wave width modulation signal generation unit is electrically connected on this first power lead, this transistorized gate terminal and a processing unit, is used for producing this pulse wave width modulation signal according to this first supply voltage and this power saving control signal;
One second source module is used for producing a second source voltage, and wherein this second source voltage and this first supply voltage have one greater than zero pressure reduction;
One image element circuit is electrically connected on this sweep trace, this data line, this first power supply module and this second source module, is used for moving based on the light emitting drive of this pressure reduction according to this sweep signal and the control of this data-signal;
One first power lead is electrically connected on this image element circuit and this first power supply module, is used for presenting this first supply voltage to this image element circuit;
One second source line is electrically connected on this image element circuit and this second source module, is used for presenting this second source voltage to this image element circuit;
One ripple detecting unit, the ripple voltage that is used for detecting this first supply voltage is to produce a detection voltage, and this ripple detecting unit comprises: a high-pass filtering circuit, be electrically connected on a switch, be used for capturing the ripple voltage of this first supply voltage; One current rectifying and wave filtering circuit is electrically connected on this high-pass filtering circuit, is used for that the ripple voltage of this first supply voltage is carried out rectifying and wave-filtering and handles to produce a direct current voltage; And an amplifying circuit, be electrically connected on this current rectifying and wave filtering circuit, be used for amplifying this DC voltage to produce this detection voltage;
One switch comprises one first end, one second end and a control end, and wherein this first end is electrically connected on this first power lead, and this second end is electrically connected on this ripple detecting unit, and this control end is used for receiving a switch controlling signal; And
One processing unit is electrically connected on this ripple detecting unit, this switch and this first power supply module, is used for producing a power saving control signal according to this detection voltage and is fed into this first power supply module, and be used to provide this switch controlling signal;
Wherein this first power supply module downgrades this pressure reduction according to this power saving control signal.
According to embodiments of the invention, disclosed a kind of organic light-emitting display device with electricity-saving function (mechanism) includes gate driver circuit, data drive circuit, sweep trace, data line, the first power supply module, second source module, image element circuit, first power lead, second source line, ripple detecting unit, switch and processing unit.Gate driver circuit is used to provide sweep signal.Data drive circuit is used to provide data-signal.Sweep trace is electrically connected on gate driver circuit, is used for the transmission scan signal.Data line is electrically connected on data drive circuit, is used for communicated data signal.The first power supply module is used for producing first supply voltage.The second source module is used for producing second source voltage, and wherein the second source voltage and first supply voltage have one greater than zero pressure reduction.Image element circuit is electrically connected on sweep trace, data line, the first power supply module and second source module, is used for according to the light emitting drive operation of sweep signal and data-signal control based on this pressure reduction.First power lead is electrically connected on the image element circuit and the first power supply module, is used for presenting first supply voltage to image element circuit.The second source line is electrically connected on image element circuit and second source module, is used for presenting second source voltage to image element circuit.The ripple detecting unit is used for detecting the ripple voltage of first supply voltage to produce detection voltage.Switch comprises first end, second end and control end, and wherein first end is electrically connected on first power lead, and second end is electrically connected on the ripple detecting unit, and control end is used for receiving a switch controlling signal.Processing unit is electrically connected on ripple detecting unit, switch and the first power supply module, is used for being fed into the first power supply module according to detecting voltage to produce power saving control signal, and is used to provide switch controlling signal.The first power supply module according to power saving control signal to downgrade the pressure reduction of the second source voltage and first supply voltage.
Learn that by above explanation the present invention can reach following effect compared with prior art really:
The organic light-emitting display device that the present invention has an electricity-saving mechanism is that the ripple according to supply voltage judges whether just at the exhibit high brilliance image, and when the exhibit high brilliance image, the running of control corresponding power module is to dwindle the pressure reduction of two supply voltages, save power consumption according to this, and can reduce panel temperature to prolong panel serviceable life.
Description of drawings
Fig. 1 is the structural representation of known active matrix organic light-emitting display device;
Fig. 2 is the topology view of the organic light-emitting display device of first embodiment of the invention;
Fig. 3 is the circuit diagram of the preferred embodiment of the first power supply module shown in Figure 2;
Fig. 4 is the structural representation of the organic light-emitting display device of second embodiment of the invention;
Fig. 5 is the circuit diagram of the preferred embodiment of the first power supply module shown in Figure 4.
The main element label declaration:
The present invention:
100: active matrix organic light-emitting display device 110,210,410: gate driver circuit
120,220,420: data drive circuit 151,251,451: the first transistor
150,250,450: image element circuit 152,252,452: transistor seconds
153,253,453: storage capacitors 160: power supply unit
230,430: sweep trace 261,461: the first power leads
265,465: switch 271,471: high-pass filtering circuit
273,473: amplifying circuit 276,476: timing circuit
285,485: second source module 382,582: power supply output unit
154,254,454: Organic Light Emitting Diode 200,400: organic light-emitting display device
240,440: data line 262,462: second source line
270,470: ripple detecting unit 272,472: current rectifying and wave filtering circuit
275,475: processing unit 280,480: the first power supply modules
381,581: the three transistors
383,583: pulse wave width modulation signal generation unit
2511,2521,2651,3811,4511,4521,4651,5811: the first ends
2513,2523,3813,4513,4523,5813: gate terminal
2512,2522,2652,3812,4512,4522,4652,5812: the second ends
2653,4653: control end Sc: switch controlling signal
Spwm: pulse wave width modulation signal Vin: DC input voitage
Vss, Vss2, Vdd2: second source voltage Sps: power saving control signal
Vd: detect voltage
Vdd, Vdd1, Vdd1 ', Vss1, Vss1 ': first supply voltage
Embodiment
Hereinafter the organic light-emitting display device that has an electricity-saving mechanism according to the present invention cooperates appended graphic elaborating especially exemplified by embodiment, but the embodiment that is provided not is the scope that contains in order to restriction the present invention.
Fig. 2 is the structural representation of the organic light-emitting display device of first embodiment of the invention.As shown in Figure 2, organic light-emitting display device 200 comprises gate driver circuit 210, data drive circuit 220, multi-strip scanning line 230, many data lines 240, a plurality of image element circuit 250, ripple detecting unit 270, processing unit 275, first power lead 261, second source line 262, switch 265, the first power supply module 280 and second source modules 285.The first power supply module 280 and second source module 285 are used to provide the first supply voltage Vdd1 and second source voltage Vss2 less than the first supply voltage Vdd1 respectively, wherein the first supply voltage Vdd1 is fed into each image element circuit 250 via first power lead 261, and second source voltage Vss2 is fed into each image element circuit 250 via second source line 262.Gate driver circuit 210 is used to provide a plurality of sweep signals, is fed into a plurality of image element circuits 250 via multi-strip scanning line 230.Data drive circuit 220 is used to provide a plurality of data-signals, is fed into a plurality of image element circuits 250 via many data lines 240.Each image element circuit 250 comprises the first transistor 251, transistor seconds 252, storage capacitors 253 and Organic Light Emitting Diode 254.The first transistor 251 is thin film transistor (TFT) (Thin Film Transistor) or field effect transistor (Field Effect Transistor).Transistor seconds 252 is N type thin film transistor (TFT) or n type field effect transistor.
The first transistor 251 comprises first end 2511, second end 2512 and gate terminal 2513, and wherein first end 2511 is electrically connected on respective data lines 240, and gate terminal 2513 is electrically connected on corresponding sweep trace 230.Transistor seconds 252 comprises first end (drain electrode) 2521, second end (source electrode) 2522 and gate terminal 2523, wherein first end 2521 is electrically connected on first power lead 261, second end, 2512, the second ends 2522 that gate terminal 2523 is electrically connected on the first transistor 251 are electrically connected on Organic Light Emitting Diode 254.Storage capacitors 253 is electrically connected between the gate terminal 2523 and second end 2522 of transistor seconds 252, so the cross-pressure of storage capacitors 253 is the grid source electrode pressure drop of transistor seconds 252, controls the electric current of the transistor seconds 252 of flowing through according to this.Organic Light Emitting Diode 254 comprises positive terminal and negative pole end, and wherein positive terminal is electrically connected on second end 2522 of transistor seconds 252, and negative pole end is electrically connected on second source line 262.Image element circuit 250 according to corresponding sweep signal and corresponding data signal controlling based on the light emitting drive action of the pressure reduction of the first supply voltage Vdd1 and second source voltage Vss2 to Organic Light Emitting Diode 254.
When organic luminous display unit 200 exhibit high brilliance images, the first power supply module 280 needs the big electric current of supply to drive a plurality of Organic Light Emitting Diodes 254 with second source module 285, that is first power supply module 280 be in heavily loaded output state with second source module 285, so the first supply voltage Vdd1 has bigger ripple voltage, ripple detecting unit 270 thereby output higher detection voltage Vd, and then making processing unit 275 produce corresponding power saving control signal Sps to drive the first lower supply voltage Vdd1 ' of the first power supply module, 280 outputs, the pressure reduction that dwindles the first supply voltage Vdd1 ' and second source voltage Vss2 according to this is to save power consumption.Please note, when organic luminous display unit 200 exhibit high brilliance images, because the first power supply module 280 is about transistor saturation current with the drive current that second source module 285 is provided, so the pressure reduction change only can cause the drive current change of trace, in addition because organic light-emitting display device 200 has high brightness and the high characteristic that contrasts, so trace reduces drive current, brightness and contrast that can't appreciable impact high brightness image.Above-mentioned high brightness image can be with power saving control signal Sps as basis for estimation, for example as power saving control signal Sps during greater than critical value, promptly judge organic light-emitting display device 200 just at the exhibit high brilliance image, promptly corresponding to the heavily loaded output state of the first power supply module 280 with second source module 285.
In one embodiment, the first power supply module 280 has continuity according to power saving control signal Sps to the adjustment of the first supply voltage Vdd1.In another embodiment, the first power supply module 280 is according to power saving control signal Sps being adjusted into periodically the first supply voltage Vdd1, and timing circuit 276 is used for timing signal update time in addition, and processing unit 275 is promptly with the update cycle of signal update time as power saving control signal Sps.In addition, power saving control signal Sps can be simulating signal or digital signal.If power saving control signal Sps is a simulating signal, then as power saving control signal Sps during greater than critical value, the first power supply module 280 downgrades the first supply voltage Vdd1, and the amount of downgrading of the first supply voltage Vdd1 ' can be fixed value or be proportional to the difference of power saving control signal Sps and critical value.If power saving control signal Sps is a digital signal, then when power saving control signal Sps indication power saving operating state, the first power supply module 280 downgrades the first supply voltage Vdd1, and the amount of downgrading of the first supply voltage Vdd1 ' is a fixed value.
Fig. 3 is the preferred embodiment circuit diagram of the first power supply module 280 shown in Figure 2.As shown in Figure 3, the first power supply module 280 comprises the 3rd transistor 381, power supply output unit 382 and pulse wave width modulation (Pulse Width Modulation) signal generation unit 383.The 3rd transistor 381 is thin film transistor (TFT) or field effect transistor.The 3rd transistor 381 comprises first end 3811, second end 3812 and gate terminal 3813, wherein first end 3811 is used for receiving DC input voitage Vin, gate terminal 3813 is electrically connected on pulse wave width modulation signal generation unit 383 to receive pulse wave width modulation signal Spwm, and second end 3812 is electrically connected on power supply output unit 382.The 3rd transistor 381 is used for according to pulse wave width modulation signal Spwm DC input voitage Vin periodically being fed into power supply output unit 382.Power supply output unit 382 is electrically connected between first power lead 261 and the 3rd transistor 381, the DC input voitage Vin that is used for periodically receiving is converted to the first supply voltage Vdd1, its internal circuit is the known circuits that diode, inductance and electric capacity made up, so no longer further give unnecessary details.
Pulse wave width modulation signal generation unit 383 is electrically connected on the gate terminal and the processing unit 275 of first power lead 261, the 3rd transistor 381, is used for having with generation according to the first supply voltage Vdd1 and power saving control signal Sps the pulse wave width modulation signal Spwm of required work period.When the ripple voltage of the first supply voltage Vdd1 is not more than critical voltage, pulse wave width modulation signal generation unit 383 only according to the first supply voltage Vdd1 to produce pulse wave width modulation signal Spwm, the pressure reduction voltage stabilizing that makes the first supply voltage Vdd1 and second source voltage Vss2 according to this is in first pressure reduction.When the ripple voltage of the first supply voltage Vdd1 during greater than critical voltage, pulse wave width modulation signal generation unit 383 according to the first supply voltage Vdd1 and power saving control signal Sps to produce pulse wave width modulation signal Spwm, the pressure reduction voltage stabilizing that makes the first supply voltage Vdd1 ' and second source voltage Vss2 according to this is in second pressure reduction, and wherein second pressure reduction is less than first pressure reduction.
From the above, organic light-emitting display device 200 according to the ripple voltage of the first supply voltage Vdd1 to judge whether just at the exhibit high brilliance image, and when the exhibit high brilliance image, the running of controlling the first power supply module 280 is to downgrade the first supply voltage Vdd1, save power consumption according to this, and can reduce panel temperature to prolong panel serviceable life.
Fig. 4 is the structural representation of the organic light-emitting display device of second embodiment of the invention.As shown in Figure 4, organic light-emitting display device 400 comprises gate driver circuit 410, data drive circuit 420, multi-strip scanning line 430, many data lines 440, a plurality of image element circuit 450, ripple detecting unit 470, processing unit 475, first power lead 461, second source line 462, switch 465, the first power supply module 480 and second source modules 485.The first power supply module 480 and second source module 485 are used to provide the first supply voltage Vss1 and second source voltage Vdd2 greater than the first supply voltage Vss1 respectively, wherein the first supply voltage Vss1 is fed into each image element circuit 450 via first power lead 461, and second source voltage Vdd2 is fed into each image element circuit 450 via second source line 462.Gate driver circuit 410 is used to provide a plurality of sweep signals, is fed into a plurality of image element circuits 450 via multi-strip scanning line 430.Data drive circuit 420 is used to provide a plurality of data-signals, is fed into a plurality of image element circuits 450 via many data lines 440.Each image element circuit 450 comprises the first transistor 451, transistor seconds 452, storage capacitors 453 and Organic Light Emitting Diode 454.The first transistor 451 is thin film transistor (TFT) or field effect transistor.Transistor seconds 452 is P type thin film transistor (TFT) or p type field effect transistor.
The first transistor 451 comprises first end 4511, second end 4512 and gate terminal 4513, and wherein first end 4511 is electrically connected on respective data lines 440, and gate terminal 4513 is electrically connected on corresponding sweep trace 430.Transistor seconds 452 comprises first end (drain electrode) 4521, second end (source electrode) 4522 and gate terminal 4523, wherein first end 4521 is electrically connected on Organic Light Emitting Diode 454, second end 4522 is electrically connected on second source line 462, and gate terminal 4523 is electrically connected on second end 4512 of the first transistor 451.Storage capacitors 453 is electrically connected between the gate terminal 4523 and second end 4522 of transistor seconds 452, so the cross-pressure of storage capacitors 453 is the grid source electrode pressure drop of transistor seconds 452, controls the electric current of the transistor seconds 452 of flowing through according to this.Organic Light Emitting Diode 454 comprises positive terminal and negative pole end, and wherein positive terminal is electrically connected on first end 4521 of transistor seconds 452, and negative pole end is electrically connected on first power lead 461.Image element circuit 450 according to corresponding sweep signal and corresponding data signal controlling based on the light emitting drive action of the pressure reduction of the first supply voltage Vss1 and second source voltage Vdd2 to Organic Light Emitting Diode 454.
Switch 465 comprises first end 4651, second end 4652 and control end 4653, wherein first end 4651 is electrically connected on first power lead 461, second end 4652 is electrically connected on ripple detecting unit 470, and control end 4653 is electrically connected on processing unit 475 with receiving key control signal Sc.Ripple detecting unit 470 is used for detecting voltage Vd according to the ripple voltage of the first supply voltage Vss1 to produce.Ripple detecting unit 470 comprises high-pass filtering circuit 471, current rectifying and wave filtering circuit 472 and amplifying circuit 473, wherein high-pass filtering circuit 471 is used for capturing the ripple voltage of the first supply voltage Vss1, the ripple voltage of 472 couples first supply voltage Vss1 of current rectifying and wave filtering circuit is carried out rectifying and wave-filtering and is handled to produce a direct current voltage, and 473 of amplifying circuits are used for amplifying this DC voltage and detect voltage Vd to produce.Processing unit 475 comprises timing circuit 476, and timing circuit 476 is used for the timing schedule time.After organic luminous display unit 400 starts, processing unit 475 is sent switch controlling signal Sc with actuating switch 465 in the schedule time, and then makes the power-saving control action of organic light-emitting display device 400.When switch 465 conductings, processing unit 475 is according to detecting voltage Vd producing power saving control signal Sps, and the first power supply module 480 can be according to power saving control signal Sps to set the first supply voltage Vss1.Details are as follows in the power-saving control running of organic light-emitting display device 400.
When organic luminous display unit 400 exhibit high brilliance images, the first power supply module 480 needs the big electric current of supply to drive a plurality of Organic Light Emitting Diodes 454 with second source module 485, that is first power supply module 480 be in heavily loaded output state with second source module 485, so the first supply voltage Vss1 has bigger ripple voltage, ripple detecting unit 470 thereby output higher detection voltage Vd, and then make processing unit 475 produce corresponding power saving control signal Sps to drive the first higher supply voltage Vss1 ' of the first power supply module, 480 outputs, dwindle the pressure reduction of the first supply voltage Vss1 ' and second source voltage Vdd2 according to this, save power consumption according to this, and brightness and contrast that can't the appreciable impact show image.In like manner, above-mentioned high brightness image can be with power saving control signal Sps as basis for estimation.
In one embodiment, the first power supply module 480 is according to the be adjusted into continuity of power saving control signal Sps to the first supply voltage Vss1.In another embodiment, the first power supply module 480 is according to power saving control signal Sps being adjusted into periodically the first supply voltage Vss1, and timing circuit 476 is used for timing signal update time in addition, and processing unit 475 is promptly with the update cycle of signal update time as power saving control signal Sps.In addition, power saving control signal Sps can be simulating signal or digital signal.If power saving control signal Sps is a simulating signal, then as power saving control signal Sps during greater than critical value, the first power supply module 480 increases the first supply voltage Vss1 ', and the amount of increasing of the first supply voltage Vss1 ' can be fixed value or be proportional to the difference of power saving control signal Sps and critical value.If power saving control signal Sps is a digital signal, then when power saving control signal Sps indication power saving operating state, the first power supply module 480 increases the first supply voltage Vss1 ', and the amount of increasing of the first supply voltage Vss1 ' is a fixed value.
Fig. 5 is the preferred embodiment circuit diagram of the first power supply module 480 shown in Figure 4.As shown in Figure 5, the first power supply module 480 comprises the 3rd transistor 581, power supply output unit 582 and pulse wave width modulation signal generation unit 583.The 3rd transistor 581 is thin film transistor (TFT) or field effect transistor.The 3rd transistor 581 comprises first end 5811, second end 5812 and gate terminal 5813, wherein first end 5811 is used for receiving DC input voitage Vin, gate terminal 5813 is electrically connected on pulse wave width modulation signal generation unit 583 to receive pulse wave width modulation signal Spwm, and second end 5812 is electrically connected on power supply output unit 582.The 3rd transistor 581 is used for according to pulse wave width modulation signal Spwm DC input voitage Vin periodically being fed into power supply output unit 582.Power supply output unit 582 is electrically connected between first power lead 461 and the 3rd transistor 581, the DC input voitage Vin that is used for periodically receiving is converted to the first supply voltage Vss1, its internal circuit is the known circuits that diode, inductance and electric capacity made up, so no longer further give unnecessary details.
Pulse wave width modulation signal generation unit 583 is electrically connected on the gate terminal and the processing unit 475 of first power lead 461, the 3rd transistor 581, is used for according to the first supply voltage Vss1 and power saving control signal Sps to produce the pulse wave width modulation signal Spwm of required work period of tool.When the ripple voltage of the first supply voltage Vss1 is not more than critical voltage, pulse wave width modulation signal generation unit 583 only according to the first supply voltage Vss1 to produce pulse wave width modulation signal Spwm, the pressure reduction voltage stabilizing that makes the first supply voltage Vss1 and second source voltage Vdd2 according to this is in first pressure reduction.When the ripple voltage of the first supply voltage Vss1 during greater than critical voltage, pulse wave width modulation signal generation unit 583 according to the first supply voltage Vss1 and power saving control signal Sps to produce pulse wave width modulation signal Spwm, the pressure reduction voltage stabilizing that makes the first supply voltage Vss1 ' and second source voltage Vdd2 according to this is in second pressure reduction, and wherein second pressure reduction is less than first pressure reduction.
From the above, organic light-emitting display device 400 according to the ripple voltage of the first supply voltage Vss1 to judge whether just at the exhibit high brilliance image, and when the exhibit high brilliance image, the action of controlling the first power supply module 480 is to increase the first supply voltage Vss1, save power consumption according to this, and can reduce panel temperature to prolong panel serviceable life.
The above only is the schematic embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (18)
1. the organic light-emitting display device with electricity-saving function is characterized in that, this organic light-emitting display device comprises:
One gate driver circuit is used to provide the one scan signal;
One data drive circuit is used to provide a data-signal;
The one scan line is electrically connected on this gate driver circuit, is used for transmitting this sweep signal;
One data line is electrically connected on this data drive circuit, is used for transmitting this data-signal;
One first power supply module, be used for producing one first supply voltage, this first power supply module comprises: a transistor, a power supply output unit and a pulse wave width modulation signal generation unit, this transistor comprises one first end, one second end and a gate terminal, wherein this first end is used for receiving a direct current input voltage, and gate terminal is used for receiving a pulse wave width modulation signal; This power supply output unit is electrically connected on one first power lead and this transistorized second end, is used for exporting this first supply voltage; This pulse wave width modulation signal generation unit is electrically connected on this first power lead, this transistorized gate terminal and a processing unit, is used for producing this pulse wave width modulation signal according to this first supply voltage and this power saving control signal;
One second source module is used for producing a second source voltage, and wherein this second source voltage and this first supply voltage have one greater than zero pressure reduction;
One image element circuit is electrically connected on this sweep trace, this data line, this first power supply module and this second source module, is used for moving based on the light emitting drive of this pressure reduction according to this sweep signal and the control of this data-signal;
This first power lead is electrically connected on this image element circuit and this first power supply module, is used for presenting this first supply voltage to this image element circuit;
One second source line is electrically connected on this image element circuit and this second source module, is used for presenting this second source voltage to this image element circuit;
One ripple detecting unit, the ripple voltage that is used for detecting this first supply voltage is to produce a detection voltage, and this ripple detecting unit comprises: a high-pass filtering circuit, be electrically connected on a switch, be used for capturing the ripple voltage of this first supply voltage; One current rectifying and wave filtering circuit is electrically connected on this high-pass filtering circuit, is used for that the ripple voltage of this first supply voltage is carried out rectifying and wave-filtering and handles to produce a direct current voltage; And an amplifying circuit, be electrically connected on this current rectifying and wave filtering circuit, be used for amplifying this DC voltage to produce this detection voltage;
One switch comprises one first end, one second end and a control end, and wherein this first end is electrically connected on this first power lead, and this second end is electrically connected on this ripple detecting unit, and this control end is used for receiving a switch controlling signal; And
Described processing unit is electrically connected on this ripple detecting unit, this switch and this first power supply module, is used for producing a power saving control signal according to this detection voltage and is fed into this first power supply module, and be used to provide this switch controlling signal;
Wherein this first power supply module downgrades this pressure reduction according to this power saving control signal.
2. organic light-emitting display device as claimed in claim 1 is characterized in that, this image element circuit comprises:
One the first transistor comprises one first end, one second end and a gate terminal, and wherein this first end is electrically connected on this data line, and this gate terminal is electrically connected on this sweep trace;
One transistor seconds comprises one first end, one second end and a gate terminal, and wherein this first end is electrically connected on this first power lead to receive this first supply voltage, and this gate terminal is electrically connected on second end of this first transistor;
One storage capacitors is electrically connected between the gate terminal and second end of this transistor seconds; And
One Organic Light Emitting Diode comprises a positive terminal and a negative pole end, and wherein this positive terminal is electrically connected on second end of this transistor seconds, and this negative pole end is electrically connected on this second source line to receive this second source voltage;
Wherein this first supply voltage is greater than this second source voltage.
3. organic light-emitting display device as claimed in claim 2 is characterized in that, this first transistor is thin film transistor (TFT) or field effect transistor.
4. organic light-emitting display device as claimed in claim 2 is characterized in that, this transistor seconds is N type thin film transistor (TFT) or n type field effect transistor.
5. organic light-emitting display device as claimed in claim 2 is characterized in that, during greater than a critical value, this first power supply module downgrades this first supply voltage according to this power saving control signal, downgrades this pressure reduction according to this in this power saving control signal.
6. organic light-emitting display device as claimed in claim 1 is characterized in that, this image element circuit comprises:
One the first transistor comprises one first end, one second end and a gate terminal, and wherein this first end is electrically connected on this data line, and this gate terminal is electrically connected on this sweep trace;
One transistor seconds comprises one first end, one second end and a gate terminal, and wherein this second end is electrically connected on this second source line to receive this second source voltage, and this gate terminal is electrically connected on second end of this first transistor;
One storage capacitors is electrically connected between the gate terminal and second end of this transistor seconds; And
One Organic Light Emitting Diode comprises a positive terminal and a negative pole end, and wherein this positive terminal is electrically connected on first end of this transistor seconds, and this negative pole end is electrically connected on this first power lead to receive this first supply voltage;
Wherein this first supply voltage is less than this second source voltage.
7. organic light-emitting display device as claimed in claim 6 is characterized in that, this first transistor is thin film transistor (TFT) or field effect transistor.
8. organic light-emitting display device as claimed in claim 6 is characterized in that, this transistor seconds is P type thin film transistor (TFT) or p type field effect transistor.
9. organic light-emitting display device as claimed in claim 6 is characterized in that, this power saving control signal is during greater than a critical value, and this first power supply module increases this first supply voltage according to this power saving control signal, downgrades this pressure reduction according to this.
10. organic light-emitting display device as claimed in claim 1 is characterized in that, this power saving control signal that this processing unit produces is a simulating signal.
11. organic light-emitting display device as claimed in claim 10, it is characterized in that, this power saving control signal is during greater than a critical value, and this first power supply module downgrades this pressure reduction according to this power saving control signal, and the amount of downgrading of this pressure reduction is proportional to the difference of this power saving control signal and this critical value.
12. organic light-emitting display device as claimed in claim 10 is characterized in that, this power saving control signal is during greater than a critical value, and this first power supply module downgrades this pressure reduction according to this power saving control signal, and the amount of downgrading of this pressure reduction is a fixed value.
13. organic light-emitting display device as claimed in claim 1 is characterized in that, this power saving control signal that this processing unit produces is a digital signal.
14. organic light-emitting display device as claimed in claim 13 is characterized in that, when this power saving control signal was indicated a power saving operating state, this first power supply module downgraded this pressure reduction according to this power saving control signal, and the amount of downgrading of this pressure reduction is a fixed value.
15. organic light-emitting display device as claimed in claim 1 is characterized in that, this processing unit comprises:
One timing circuit is used for one schedule time of timing;
Wherein after this organic light-emitting display device start, this processing unit is sent this switch controlling signal with this switch of conducting in this schedule time.
16. organic light-emitting display device as claimed in claim 15 is characterized in that, this timing circuit is used for the one signal update time of timing in addition, and this processing unit is with the update cycle of this signal update time as this power saving control signal.
17. organic light-emitting display device as claimed in claim 1, it is characterized in that, when the ripple voltage of this first supply voltage is not more than a critical voltage, this pulse wave width modulation signal generation unit produces this pulse wave width modulation signal according to this first supply voltage, makes this pressure reduction voltage stabilizing in one first pressure reduction.
18. organic light-emitting display device as claimed in claim 17, it is characterized in that, the ripple voltage of this first supply voltage is during greater than this critical voltage, this pulse wave width modulation signal generation unit produces this pulse wave width modulation signal according to this first supply voltage and this power saving control signal, make this pressure reduction voltage stabilizing in one second pressure reduction, wherein this second pressure reduction is less than this first pressure reduction.
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| CN200910210142XA CN101673511B (en) | 2009-10-27 | 2009-10-27 | Organic light emitting display device with power saving function |
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| CN200910210142XA CN101673511B (en) | 2009-10-27 | 2009-10-27 | Organic light emitting display device with power saving function |
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| CN101673511B true CN101673511B (en) | 2011-09-07 |
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| JPWO2013118219A1 (en) | 2012-02-08 | 2015-05-11 | パナソニック株式会社 | EL display device and manufacturing method thereof |
| CN103593638B (en) * | 2013-11-21 | 2016-08-17 | 北京象开科技有限公司 | Low-power consumption bar code decoding equipment based on image procossing |
| CN106057861B (en) * | 2016-08-08 | 2019-03-12 | 深圳市华星光电技术有限公司 | OLED display and the method for reducing OLED display power consumption |
| JP2019090940A (en) * | 2017-11-15 | 2019-06-13 | シャープ株式会社 | Pixel inspection method, pixel inspection device, and display |
| CN109920372B (en) * | 2017-12-12 | 2021-01-29 | 京东方科技集团股份有限公司 | Display driving module, display device and voltage adjusting method |
| CN110706668A (en) * | 2019-09-18 | 2020-01-17 | 深圳市华星光电技术有限公司 | GOA circuit driving system and display device |
| TWI714334B (en) * | 2019-11-05 | 2020-12-21 | 新唐科技股份有限公司 | Control device, display device and operation method thereof |
| CN111354315B (en) * | 2020-04-15 | 2021-08-10 | 京东方科技集团股份有限公司 | Display panel, display device and pixel driving method |
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