CN1932936A - Organic electroluminescent device and driving method thereof - Google Patents

Organic electroluminescent device and driving method thereof Download PDF

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Publication number
CN1932936A
CN1932936A CNA2006100899728A CN200610089972A CN1932936A CN 1932936 A CN1932936 A CN 1932936A CN A2006100899728 A CNA2006100899728 A CN A2006100899728A CN 200610089972 A CN200610089972 A CN 200610089972A CN 1932936 A CN1932936 A CN 1932936A
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Prior art keywords
data
discharge
circuit
video data
gtg
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CNA2006100899728A
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CN100514418C (en
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南荣熙
李炫宰
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LG Display Co Ltd
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LG Electronics Inc
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3216—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using a passive matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3283—Details of drivers for data electrodes in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0248—Precharge or discharge of column electrodes before or after applying exact column voltages
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0252—Improving the response speed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The present invention relates to an organic electroluminescent device and driving method thereof. The method of driving an electroluminescent device having a plurality of pixels formed on emitting areas crossed by data lines and scan lines comprises detecting a gray scale of a data current according to a display data inputted from outside, and discharging the data lines to a discharging level corresponding to the display data according to the detected gray scale. The organic electroluminescent device and driving method thereof according to the present invention can emit the pixels as desired brightness independently of a gray scale by making the discharging circuit regulate the discharge level according to the gray scale.

Description

Organic electroluminescence device and driving method thereof
Technical field
The present invention relates to a kind of organic electroluminescence device and driving method thereof.Especially, the present invention relates to a kind ofly can change other organic electroluminescence device of arrester stage and driving method thereof according to GTG.
Background technology
Organic electroluminescence device is a kind of when the device that sends the light with predetermined wavelength when it applies a certain voltage.
Fig. 1 is the figure that organic electroluminescence device in the prior art is shown.With, Fig. 2 illustrates the sweep signal of the pixel that offers Fig. 1 and the sequential chart of data current.
In Fig. 1, organic electroluminescence device of the prior art comprises plate 100, scan drive circuit 110, control circuit 120, data drive circuit 130, pre-charge circuit 140 and discharge circuit 150.
Plate 100 is included in a plurality of pixel E11 to E44 that form on the emitting area that data line D1 to D4 and sweep trace S1 to S4 intersect.
Scan drive circuit 110 sequentially is transferred to pixel with sweep signal by sweep trace S1 to S4.
Control circuit 120 is received from the video data such as the RGB data of outside input, and according to video data control signal is transferred to scan drive circuit 110, data drive circuit 130, precharge driving circuit 140 and discharge circuit 150.
Below, will describe the driving method of organic electroluminescence device in detail.
But, for convenience of explanation, suppose that first video data and second video data are inputed to control circuit 120 according to the order of sequence.
During the first precharge time pcha1 as shown in Figure 2, pre-charge circuit 140 is applied to data line D1 to D4 according to from controlling first video data that circuit 120 provides with first pre-charge current.
In this case, because first video data is high gray (80%), therefore during the first precharge time pcha1, first pre-charge current overshoot fully (overshooting).Thus, the start time T2 of the low logic region since the second sweep signal SP2, pixel E11 to E44 comes luminous with 80% GTG.
Then, data drive circuit 130 offers pixel E11 to E44 by data line D1 to D4 with first data current (80% GTG) according to first video data from control circuit 120 transmission.
Subsequently, during second discharge time, discharge circuit 150 is discharged to a certain discharge rank DL1 according to first video data from control circuit 120 transmission with data line D1 to D4.This discharge circuit 150 is formed with a plurality of Zener diode ZD1 to ZD4, and has therefore fixed the discharge rank equably, and does not rely on the luminous GTG of pixel E11 to E44.
Next, during the second precharge time pcha2, pre-charge circuit 140 is applied to data line D1 to D4 according to from controlling second video data that circuit 120 provides with second pre-charge current.
Then, data drive circuit 130 offers pixel E11 to E44 by data line D1 to D4 with second data current (20% GTG) according to from second video data of controlling circuit 120 transmission.
In this case, because second video data is low GTG (20%), therefore second pre-charge current is not by overshoot fully.As a result, after the start time T3 through the low logic area among the 3rd sweep signal SP3, pixel E11 to E44 is luminous according to 20% GTG, as the a-quadrant of Fig. 2.
Thus, pixel E11 to E44 can't come luminous with expectation brightness.
If aforesaid luminous luminous with low GTG afterwards with high gray, then pixel E11 to E44 can't be luminous with expectation brightness, and it is next luminous to expect brightness to increase power consumption.
Summary of the invention
An object of the present invention is to provide a kind of organic electroluminescence device and driving method thereof, this organic electroluminescence device can have the light of wishing brightness by making discharge circuit not rely on the emission of GTG ground according to GTG adjustment discharge rank.
Another object of the present invention provides a kind of organic electroluminescence device and driving method thereof, thereby this organic electroluminescence device can be launched the pixel that has corresponding to the brightness of GTG by using variable resistor to change the discharge rank according to GTG.
Luminescent device according to the present invention comprises the multi-strip scanning line on the first direction, be different from many data lines on the second direction of first direction, plate with a plurality of pixels that on the emitting area of data line and sweep trace intersection, form, control circuit according to first video data of importing in proper order from the outside and second video data generation control signal, and discharge circuit, this discharge circuit is during first discharge time according to first video data, according to from the control circuit control signals transmitted, with data line be discharged to corresponding to first video data first the discharge rank, and during second discharge time, according to the second discharge rank discharge data line corresponding to second video data according to second video data.
Luminescent device according to the present invention comprises the multi-strip scanning line on the first direction, at many data lines that are different from the second direction of first direction, plate with a plurality of pixels that on the emitting area of data line and sweep trace intersection, form, and discharge circuit, this discharge circuit is during first discharge time according to first video data, according to first video data of importing in proper order from the outside and second video data data line is discharged to the first discharge rank corresponding to first video data, and during second discharge time, the data line is discharged according to the second discharge rank corresponding to second video data according to second video data.
Driving method with electroluminescent device of a plurality of pixels that on the emitting area that intersects by data line and sweep trace, form, comprise according to video data and detect the GTG of data current and data line is discharged to discharge rank corresponding to video data according to the GTG that detects from outside input.
Can irrespectively send the pixel of the brightness of hope with GTG by making discharge circuit according to organic electroluminescence device of the present invention and driving method thereof according to GTG adjustment discharge rank.
Can change discharge rank by using variable resistor according to organic electroluminescence device of the present invention and driving method thereof, thereby send pixel corresponding to the brightness of GTG according to GTG.
Description of drawings
Fig. 1 is the figure that organic electroluminescence device of the prior art is shown;
Fig. 2 illustrates the sweep signal of the pixel that offers Fig. 1 and the sequential chart of data current;
Fig. 3 is the figure that roughly illustrates according to the organic electroluminescence device of first embodiment of the invention;
Fig. 4 illustrates according to various embodiments of the present invention to offer the sweep signal of pixel of organic electroluminescence device and the sequential chart of data current;
Fig. 5 is the process flow diagram that illustrates according to the driving method of the organic electroluminescence device of first embodiment of the invention;
Fig. 6 is the figure that roughly illustrates according to the organic electroluminescence device of second embodiment of the invention;
Fig. 7 is the process flow diagram that illustrates according to the driving method of the organic electroluminescence device of second embodiment of the invention.
Embodiment
In conjunction with the accompanying drawings, according to detailed description, can more be expressly understood the present invention.
Fig. 3 is the figure that roughly illustrates according to the organic electroluminescence device of first embodiment of the invention.Fig. 4 illustrates the sweep signal that the pixel for organic electroluminescence device according to the embodiment of the invention provides and the sequential chart of data current.
In Fig. 3, comprise according to the organic electroluminescence device of first embodiment of the invention: plate 200, scan drive circuit 210, control circuit 220, data drive circuit 230, pre-charge circuit 240 and first discharge circuit 250.
Plate 200 is included in a plurality of pixel E11 to E44 that form on the launch site of data line D1 to D4 and sweep trace S1 to S4 intersection.
Each pixel E11 to E44 all is formed has anode layer, organic layer and cathode layer, and sends the light with certain wavelength when positive voltage being applied to anode layer and negative voltage is applied to cathode layer.
Scan drive circuit 210 sequentially offers sweep trace S1 to S4 with sweep signal.
In detail, each sweep signal that all has low logic region and a high logic region offers sweep trace S1 to S4 with it for scan drive circuit 210.As a result, the low logic region of pixel E11 to E44 in sweep signal is luminous.
It is the RGB data that control circuit 220 receives from the shows signal of outside input.And control circuit 220 also according to the video data of order input, is transferred to scan drive circuit 210, data drive circuit 230, pre-charge circuit 240 and discharge circuit 250 with control signal.
Below, suppose that first video data and second video data sequentially import.
First video data that pre-charge circuit 240 receives from control circuit 220, and, first pre-charge current is imposed on data line D1 to D4 according to first video data that receives.
Data drive circuit 230 offers first data current each the data line D1 to D4 that applies first pre-charge current to it according to first video data that provides from control circuit 220.At this, data current and sweep signal are synchronous.
On the other hand, control circuit 220 detects GTG according to first and second video datas that receive.This control circuit 220 will offer first discharge circuit 250 by using the gray level information that detects to control other control signal of arrester stage CS1 to CS4.
In detail, control circuit 220 determines whether the GTG that detects is high gray (for example, whether GTG is greater than 50%).
If the GTG that detects is a high gray, for example the GTG according to second video data is 80%, and as shown in Figure 4, then control circuit 220 provides control signal CS1 to CS4, indicates first discharge circuit 250 to reduce the discharge rank according to second video data.
On the other hand, if the GTG that detects is low GTG, for example the GTG according to second video data is 20%, as shown in Figure 4, then control circuit 220 provides control signal CS1 to CS4, indicates first discharge circuit 250 to increase the discharge rank according to second video data.
First discharge circuit 250 comprises the first discharge executive circuit 252 and the second discharge executive circuit 254.
The first and second discharge executive circuits 252,254 are discharged to discharge rank corresponding to second video data (the first and second discharge ranks) with data line D1 to D4, wherein, provide data current according to first and second video datas that provide from control circuit 220 to this data line D1 to D4.
The control signal CS1 to CS4 that the first discharge executive circuit 252 receives from control circuit 220, and according to control signal CS1 to the CS4 change first discharge rank.In detail, the first discharge executive circuit 252 is formed has a plurality of variable resistor R1 to R4, and changes the first discharge rank by the resistance value that changes variable resistor R1 to R4 according to control signal CS1 to CS4.
For example, if control signal CS1 to CS4 indication increases by the first discharge rank, then the first discharge executive circuit 252 increases the resistance value of variable resistor R1 to R4.But if the control signal indication reduces by the first discharge rank, then the first discharge executive circuit 252 reduces the resistance value of variable resistor R1 to R4.The first discharge executive circuit 252 is discharged to the first discharge rank according to the magnitude of voltage that is applied to variable resistor R1 to R4 with data line D1 to D4.
The second discharge executive circuit 254 is discharged to the second discharge rank with data line D1 to D4.The second discharge executive circuit 254 is formed has a plurality of Zener diode ZD1 to ZD4, thereby it can discharge data line D1 to D4 up to the second discharge rank independently with the GTG of second video data.
Subsequently, with the driving method of following description according to the organic electroluminescence device of first embodiment.
Fig. 5 is the process flow diagram that illustrates according to the driving method of the organic electroluminescence device of first embodiment of the invention.
In Fig. 5, at first, in step S300, control circuit 220 detects GTG according to second video data that receives from the outside.
Next, in step S310, control circuit 220 determines whether the GTG that detects is high gray (for example, whether GTG is greater than 50%).
If the GTG that detects is a high gray, for example the GTG according to second video data is 80%, as shown in Figure 4, then control circuit 220 provides control signal CS1 to CS4, indicates first discharge circuit 252 to reduce the resistance value of variable resistor R1 to R4 according to the GTG that detects.In this case, also can provide control signal CS1 to CS4, indication is maintained predetermined value with the resistance value of variable resistor R1 to R4.
Then, in step S330, the first discharge executive circuit 252 reduces the resistance value of variable resistor R1 to R4 according to control signal CS1 to CS4.
On the other hand, if the GTG that detects is low GTG, for example the GTG according to second video data is 20%, as shown in Figure 4, then control circuit 220 provides control signal CS1 to CS4, indicates first discharge circuit 252 to increase the resistance value of variable resistor R1 to R4 according to the GTG that detects.
Then, in step S320, the first discharge executive circuit 252 increases the resistance value of variable resistor R1 to R4 according to control signal CS1 to CS4.
Then, in step S340, the first and second discharge executive circuits 252,254 are discharged to a discharge rank (80% GTG is DL1, and 20% GTG is DL2) according to second video data with data line D1 to D4.
Next, in step S350, pre-charge circuit 240 imposes on data line D1 to D4 according to second video data with pre-charge current.
Then, in step S360, data drive circuit 230 is according to second video data, and D1 to D4 offers pixel E11 to E44 with data current by data line.
In brief, the resistance value that can change the variable resistor R1 to R4 in the first discharge executive circuit 252 by the GTG according to video data is adjusted the discharge rank.Thus, even come when luminous by change brightness from high gray to low GTG when organic electroluminescence device, it still can send the light corresponding to the GTG of video data at the start time T3 place of the low logic region of sweep signal, shown in the B zone of Fig. 4.
Subsequently, with organic electroluminescence device and the driving method thereof of following description according to second embodiment of the invention.
Fig. 6 is the figure that briefly shows according to the organic electroluminescence device of second embodiment of the invention.
In Fig. 6, comprise plate 200, scan drive circuit 210, control circuit 220, data drive circuit 230, pre-charge circuit 240 and second discharge circuit 260 according to the organic electroluminescence device of second embodiment of the invention.
Below, therefore the structure except second discharge circuit 260 has omitted its explanation hereinafter with identical according to the organic electroluminescence device of first embodiment.
Below, suppose that first video data and second video data are imported according to the order of sequence.
Pre-charge circuit 240 receives first video data from control circuit 220, and according to first video data that receives first pre-charge current is imposed on data line D1 to D4.
Data drive circuit 230 offers data line D1 to D4 according to first video data that provides from control circuit 220 with first data current, wherein applies first pre-charge current to data line D1 to D4.
Second discharge circuit 260 comprises GTG testing circuit 262 and discharge executive circuit 264.
GTG testing circuit 262 receives second video data from control circuit 220, detects GTG according to second video data that receives, and the gray level information that detects is transferred to discharge executive circuit 264.
In detail, discharge executive circuit 264 determines by the gray level information of transmission whether the GTG that detects is high gray (for example, GTG is greater than 50%).If the GTG that detects is a high gray, be 50% for example and be 80% words according to the GTG of second video data according to the GTG of first video data, as shown in Figure 4, the executive circuit 264 that then discharges is discharged to the first fixing discharge rank DL1 with data line D1 to D4, wherein, provide first data current according to first video data to data line D1 to D4 from control circuit 220 transmission.
In this case, discharge executive circuit 264 is discharged to data line D1 to D4 the first discharge rank DL1 independently with GTG.
But, if the GTG that detects is low GTG, be 80% for example and be 20% that as shown in Figure 4, the executive circuit 264 that then discharges is discharged to the second discharge rank DL2 according to first video data with data line D1 to D4 according to the GTG of second video data according to the GTG of first video data.
In this case, discharge executive circuit 264 is discharged to the discharge rank corresponding with GTG with data line D1 to D4.
For example, when the GTG that detects was 40%, discharge executive circuit 264 was discharged to the first discharge rank DL1 and the second discharge rank of discharging between the rank DL2 with data line D1 to D4.
Executive circuit 264 discharge according to an embodiment of the invention by control dcha1 discharge time and dcha2, data line D1 to D4 is discharged to discharge rank DL1 and DL2.
And discharge executive circuit 264 can be discharged to discharge rank DL1 and DL2 with data line D1 to D4 by at identical time durations control discharge capacity.
Pre-charge circuit 240 imposes on discharge data line D1 to D4 according to second video data that receives with second pre-charge current.
Data drive circuit 230 offers data line D1 to D4 according to second video data from control circuit 220 transmission with second data current, and wherein second pre-charge current is applied to this data line D1 to D4.
Below, with the driving method of following description according to the organic electroluminescence device of second embodiment.
Fig. 7 is the figure according to the driving method of the organic electroluminescence device of second embodiment of the invention.
In Fig. 7, in step S400, data drive circuit 230 offers pixel E11 to E44 by data line D1 to D4 with first data current according to first video data.
Then, in step S402, the GTG that GTG testing circuit 262 detects according to second video data.
Next, in step S404, GTG testing circuit 262 determines whether the GTG that detects is high gray.
In step S406, if the GTG that detects is a high gray, the executive circuit 264 that then discharges is discharged to the first fixing discharge rank DL1 with data line D1 to D4.
On the other hand, in step S408, if the GTG that detects is low GTG, the executive circuit 264 that then discharges is discharged to discharge rank corresponding to the GTG S408 that detects with data line D1 to D4.
Next, in step S410, pre-charge circuit 240 is applied to data line D1 to D4 according to second video data with pre-charge current.
Then, in step S412, data drive circuit 230 is according to second video data, and D1 to D4 offers pixel E11 to E44 with data current by data line.
Below, organic electroluminescence device of the present invention and a kind of device of the prior art are compared.
In the organic electroluminescence device in the prior art, the discharge rank normally identical and irrelevant with GTG.Thus, if be low GTG, then, will offer data line D1 to D4, a-quadrant as shown in Figure 2 by the little magnitude of current than the value of hope at the low logic area of sweep signal according to the GTG of second video data.
Thus, organic electroluminescence device of the prior art sends the light lower than the value brightness of hope, and therefore by increasing the brightness that power reaches hope.
Yet, in organic electroluminescence device of the present invention, change the discharge rank according to GTG corresponding to second video data.Thus, if be low GTG, then the data current of hope is offered data line D1 to D4, as the B location of Fig. 4 at the low logic region place of sweep signal according to the GTG of second video data.
Therefore, organic electroluminescence device of the present invention is with of the prior art different, and it does not need to increase power, and has therefore reduced power consumption.
According to a preferred embodiment of the invention, should be noted that according to top instruction, those skilled in the art can modify and change.Therefore, should be appreciated that, within the scope and spirit of describing by appended claims, can make change for specific embodiment of the present invention.

Claims (20)

1. luminescent device comprises:
Multi-strip scanning line on first direction;
At many data lines that are different from the second direction of first direction;
Plate with a plurality of pixels that on the emitting area of data line and sweep trace intersection, form; With
Control circuit, it produces control signal according to first video data of importing according to the order of sequence from the outside and second video data; With
Discharge circuit, its basis is from the control circuit control signals transmitted, during first discharge time according to first video data, with data line be discharged to corresponding to first video data first the discharge rank, and during second discharge time, according to the second discharge rank discharge data line corresponding to second video data according to second video data.
2. according to the device of claim 1, wherein discharge circuit comprises:
The first discharge executive circuit, its control signal according to control circuit is discharged to variable rank with data line; With
The second discharge executive circuit, it is discharged to intended level with data line.
3. according to the device of claim 2, wherein the first discharge executive circuit comprises at least one variable resistor.
4. according to the device of claim 3, wherein when second video data was the high gray data, control circuit provided control signal to the first discharge executive circuit, and indication reduces variable resistor, so that the discharge rank is corresponding to second video data.
5. according to the device of claim 3, wherein when second video data was low luma data, control circuit provided control signal to the first discharge executive circuit, and indication increases variable resistor, so that the discharge rank is corresponding to second video data.
6. according to the device of claim 1, also comprise:
Scan drive circuit, it offers sweep trace with sweep signal;
Pre-charge circuit, it receives first and second video datas from the data storage part, and will offer data line according to the pre-charge current of first and second video datas that receive; With
Data drive circuit, it receives first and second video datas from the data storage part, and will offer data line according to first and second data currents of first and second video datas that receive.
7. according to the device of claim 1, wherein device is an organic electroluminescence device.
8. luminescent device comprises:
Multi-strip scanning line on first direction;
At many data lines that are different from the second direction of first direction;
Plate with a plurality of pixels that on the emitting area of data line and sweep trace intersection, form; With
Discharge circuit, it is according to first video data and second video data imported according to the order of sequence from the outside, during first discharge time according to first video data, data line is discharged to the first discharge rank corresponding with first video data, and during second discharge time according to second video data, with data line be discharged to corresponding to second video data second the discharge rank.
9. device according to Claim 8, wherein when second video data is low luma data, discharge circuit is discharged to discharge rank corresponding to second video data with data line.
10. according to the device of claim 9, wherein discharge circuit is adjusted the discharge rank discharge time by controlling.
11. device according to Claim 8 wherein when second video data is the high gray data, is discharged to intended level with the circuit discharging data line.
12. device according to Claim 8, wherein discharge circuit comprises:
The GTG testing circuit, GTG of data current is provided according to second video data that partly provides from data storage for it; With
The discharge executive circuit, it is by using first video data, and data line is discharged to discharge rank corresponding to second video data.
13. device according to Claim 8 also comprises:
Scan drive circuit, it offers sweep trace with sweep signal;
Pre-charge circuit, it receives first and second video datas from the data storage part, and will offer data line according to first and second pre-charge currents of first and second video datas that receive; With
Data drive circuit, it receives first and second video datas from the data storage part, and according to first and second video datas that receive, first and second data currents is offered data line.
14. device according to Claim 8, wherein device is an organic electroluminescence device.
15. the driving method of an organic electroluminescence device, this organic electroluminescence device have a plurality of pixels that form on the emitting area that is intersected by data line and sweep trace, this method comprises:
(a) basis detects the GTG of data current from the video data of outside input; With
(b), data line is discharged to discharge rank corresponding to video data according to the GTG that detects.
16. according to the method for claim 15, wherein step (b) comprising:
When the GTG that detects is high gray, reduce the variable resistor that is included in the discharge circuit, so that the discharge rank is corresponding to video data; With
Data line is discharged to the discharge rank.
17. according to the method for claim 15, wherein step (b) comprising:
When the GTG that detects is when hanging down GTG, to increase the variable resistor that is included in the discharge circuit, so that the discharge rank is corresponding to video data; With
Data line is discharged to the discharge rank.
18. according to the method for claim 15, wherein step (b) comprising:
When the GTG that detects is high gray, data line is discharged to the predetermined discharge rank; With
When the GTG that detects is low GTG, data line is discharged to discharge rank according to GTG.
19., wherein, data line is discharged to discharge rank according to GTG by control discharge time according to the method for claim 18.
20. the method according to claim 15 also comprises:
To be applied to according to the pre-charge current of video data by the data line that discharges; With
To offer the data line that applies pre-charge current to it according to the data current of video data.
CNB2006100899728A 2005-09-15 2006-05-30 Organic electroluminescent device and driving method thereof Active CN100514418C (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106205473A (en) * 2014-10-13 2016-12-07 三星显示有限公司 Organic light-emitting display device and driving method thereof
CN106340274A (en) * 2015-07-17 2017-01-18 联咏科技股份有限公司 Display apparatus and driving method thereof
CN107464527A (en) * 2017-08-28 2017-12-12 芯颖科技有限公司 Display driving method, circuit and system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106205473A (en) * 2014-10-13 2016-12-07 三星显示有限公司 Organic light-emitting display device and driving method thereof
CN106205473B (en) * 2014-10-13 2019-08-16 三星显示有限公司 Organic light-emitting display device and its driving method
CN106340274A (en) * 2015-07-17 2017-01-18 联咏科技股份有限公司 Display apparatus and driving method thereof
US10163416B2 (en) 2015-07-17 2018-12-25 Novatek Microelectronics Corp. Display apparatus and driving method thereof
CN107464527A (en) * 2017-08-28 2017-12-12 芯颖科技有限公司 Display driving method, circuit and system

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