CN100446069C - Color adjusting device of electroluminescence display - Google Patents
Color adjusting device of electroluminescence display Download PDFInfo
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- CN100446069C CN100446069C CNB2005100877902A CN200510087790A CN100446069C CN 100446069 C CN100446069 C CN 100446069C CN B2005100877902 A CNB2005100877902 A CN B2005100877902A CN 200510087790 A CN200510087790 A CN 200510087790A CN 100446069 C CN100446069 C CN 100446069C
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Abstract
This invention discloses a regulation method for colors of electric excitation LED, which carries out the following steps to first, second and third sub-pixels of each of the multiple pixels included in the LED: providing a scan signal, a first data signal, a second data signal and a third data signal and a display signal separately in a panel display period, then detecting the brightness proportion of the three sub-pixels to generate a first regulation signal and a second regulation signal according to the proportion and a preset proportion, providing a first regulating signal and a second regulating signal to the first and second sub-pixels to let the brightness of them change continuously in the panel display period and such change can be declined. This invention makes the actual brightness proportion of multiple sub-pixels in conformity with the preset light color proportion to avoid color bias.
Description
Technical field
The present invention relates to a kind of electro-exciting light-emitting display (Active-Matrix Organic LightEmission Display), particularly a kind of color adjustment method of active organic electroluminescent display.
Background technology
The active organic electroluminescent display is the slimming display of a kind of new generation, it mainly is that the two big technology that combine form, one be can be luminous the relevant coating technique of organic electric exciting light-emitting diode (Organic LightEmission Diode), second it be the manufacturing technology of substrate with the thin film transistor (TFT) of arrayed and necessary circuitry.Please refer to Fig. 1, the sub-pixel (sub-pixel) 12 of a plurality of arrayed can be divided in the viewing area of active organic electroluminescent display 10, and the wherein sub-pixel 12 that Fig. 1 shows is as representative.
When active organic electroluminescent display 10 was operated to display frame, in different sequential, each sub-pixel 12 received an electric signal and produces a corresponding brightness.Different brightness can be represented different GTGs.And a pixel (pixel) has comprised the sub-pixel 12 of a plurality of different colours, for example, one sub-pixel 12, that produces red light produces the sub-pixel 12 of blue light and the sub-pixel 12 of a green light of a generation, the three is set at the position of mutual vicinity, and be combined into a pixel, by control three's brightness, then can utilize the different GTG of three coloured light and blend predetermined show photochromic.
With regard to existing technology, the composition of the sub-pixel in one pixel, be not to have only above-mentioned red, blue and green this a kind of composition mode, also have the technology that is combined into a pixel with four red, blue, green and white sub-pixels, the correlation technique that other kind formed mode also discloses or has used.
Please refer to Fig. 1, comprise an organic electric exciting light-emitting diode 14, a switching transistor 16, a driving transistors 18 and an electric capacity 20 among the sub-pixel 12.And a data line (data line) 22, one scanning linear (scan line) 24 and a power lead 26 are used to import relevant electric signal and power supply to sub-pixel 12, with operation sub-pixel 12.Wherein, organic electric exciting light-emitting diode 14 is the significant components that convert electric energy to luminous energy, and when operation offers organic electric exciting light-emitting diode 14 1 shows signal by power lead 26.
Operation situation when sub-pixel 12 is operated is described below, can and cooperate Fig. 2 A and Fig. 2 B with reference to Fig. 1, Fig. 2 A and Fig. 2 B are used to show the brightness of sub-pixel and scan relation between the signal, wherein transverse axis is a time shaft, the longitudinal axis of Fig. 2 A is represented brightness, the longitudinal axis of Fig. 2 B represents to scan signal, and the time interval shown in label T1 and the T2 is represented a picture display cycle (the duration of a frame) respectively.
Among Fig. 1, switching transistor 16 is electrically connected to data line 22 and scanning linear 24, and when desiring to make organic electric exciting light-emitting diode 14 to produce a predetermined brightness, the signal that scans that scanning linear 24 provides is heightened its numerical value, shown in Fig. 2 B.
So switching transistor 16 is unlocked, so the data-signal that provides of data line 22 can inject electric capacity 20 and driving transistors 18, and organic electric exciting light-emitting diode 14 can be controlled and produce one first predetermined luminance b1.
Afterwards, the scanning signal and can turn down its numerical value of scanning linear 24, though therefore switching transistor 16 cuts out, but the electric signal of data line 22 has injected 18 of electric capacity 20 and driving transistorss, therefore in the time interval of picture display cycle T1, the brightness that organic electric exciting light-emitting diode 14 is produced still is the first predetermined luminance b1 always.
This scanning linear 24 electric signal that need not make are kept the numerical value of heightening always in picture display cycle T1, and sub-pixel 12 is designed to a memory element, but the mode of data memory signal is the characteristic of active organic electroluminescent display 10.
When next picture display cycle T2, the electric signal of scanning linear 24 is heightened its numerical value once more, and the input of next picture corresponding data line 22 electric signal, and make organic electric exciting light-emitting diode 14 transfer to produce one second predetermined luminance b2.
What deserves to be mentioned is, please continue with reference to Fig. 2 A and Fig. 2 B, in picture display cycle T1, the brightness that human eye can be discovered is the integration of brightness b1 to picture display cycle T1, in like manner, in the picture display cycle T2, the brightness that human eye can be perceived is the integration of brightness b2 to picture display cycle T2.
Active organic electroluminescent display 10 need carry out the whole step of caidiao opera of the same colour usually before dispatching from the factory, so that shown photochromic can conforming to of the electric signal of control usefulness and active organic electroluminescent display 10.The active organic electroluminescent display 10 of red to have, green and blue three kinds of photochromic sub-pixels 12 is an example, when color is adjusted, utilize data line 22 electric signal to cause three kinds of photochromic sub-pixels 12 to produce its high-high brightness respectively, and detect three kinds of photochromic mutual ratios.In theory, three kinds photochromic when all being in high-high brightness, and described pixel is resulting mixes out the photochromic white light that should be.
Yet, just because of under the unjustified situation, three kinds of photochromic mutual ratios of three sub pixels 12 might not equal the required special ratios of white light just, and (for example the standard criterion of NTSC is a red light, the ratio of green light and blue light should be 3: 6: 1), and it is relevant with the luminescence efficiency (efficiency) of organic electric exciting light-emitting diode 14 itself among the sub-pixel 12, therefore, for example, an if red light organic electric exciting light-emitting diode, one green light organic electric exciting light-emitting diode is 4: 6: 1 with the luminescence efficiency ratio of a blue light organic electric exciting light-emitting diode, then need to carry out the step that described color is adjusted, otherwise when the needs display white, the color that is presented not is white accurately, and the demonstration of other color also can and then produce aberration.
In the prior art, adjusting applied method about above-mentioned color, is to adjust for the aperture opening ratio of sub-pixel 12 substantially.For example, the luminescence efficiency ratio of above-mentioned red light organic electric exciting light-emitting diode, a green light organic electric exciting light-emitting diode and a blue light organic electric exciting light-emitting diode is under 4: 6: 1 the situation, then prior art can make the aperture opening ratio of green light organic electric exciting light-emitting diode and blue light organic electric exciting light-emitting diode keep maximum rating, and the aperture opening ratio that makes the red light organic electric exciting light-emitting diode is 75 percent of a maximum rating, thus, can meet 3: 6: 1 NTSC standard.
But the shortcoming of above-mentioned prior art is: the regulation and control of carrying out aperture opening ratio at specific photochromic sub-pixel 12 are not an easy operation, it relates to the technical difficulty of many contrapositions and optics, wayward with implement, if do not utilize aperture opening ratio to carry out the regulation and control of coloured light ratio, then need change the luminescence efficiency of organic electric exciting light-emitting diode 14, this more is difficult for the condition adjusted for another again.
Summary of the invention
A purpose of the present invention is to provide a kind of active organic electroluminescent display and color adjustment method thereof, situation about not conforming to the required coloured light special ratios of the luminescence efficiency and the display of the organic electric exciting light-emitting diode that is applied in different color light.
Another object of the present invention is to provide a kind of active organic electroluminescent display and color adjustment method thereof, carry out the step of aperture opening ratio adjustment for the sub-pixel of display to exempt prior art.
The invention provides a kind of color adjustment method of electro-exciting light-emitting display, particularly about a kind of color adjustment method of active organic electroluminescent display.Described electro-exciting light-emitting display has a plurality of pixels, and each pixel comprises one first sub-pixel, one second sub-pixel and one the 3rd sub-pixel at least, and this method comprises:
Provide the one scan signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel in display cycle at a picture;
Provide one first money data number, one second data-signal and one the 3rd data-signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel respectively;
Provide a shows signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel;
Detect described first sub-pixel, second sub-pixel and the 3rd sub-pixel in the brightness ratio of described picture in the display cycle;
Produce one first according to a described brightness ratio and a predetermined luminance ratio and adjust signal and respectively corresponding described first sub-pixel of one second adjustment signal and second sub-pixel.
Provide the described first adjustment signal and second to adjust signal to described first sub-pixel and second sub-pixel, to adjust the current potential discharge of electric capacity in described first sub-pixel and second sub-pixel, the brightness of described first sub-pixel and second sub-pixel is changed on continuity ground in the display cycle at described picture, and described change can be to be increased or decline.
Step according to described brightness ratio and the predetermined luminance ratio generation first adjustment signal and second adjustment corresponding respectively described first sub-pixel of signal and second sub-pixel comprises: produce described first according to described brightness ratio and described predetermined luminance ratio and adjust signal, the second adjustment signal and corresponding described first sub-pixel of one the 3rd adjustment signal difference, second sub-pixel and the 3rd sub-pixel.
Provide the described first adjustment signal and the second adjustment signal to comprise: to provide described first to adjust signal, the second adjustment signal and the 3rd adjustment signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel to the step of described first sub-pixel and second sub-pixel.
Described picture provides described first sweep signal providing described first to adjust signal and second and adjust the step of signal to described first sub-pixel and second sub-pixel to the step of described first sub-pixel, second sub-pixel and the 3rd sub-pixel in the display cycle before.
Described first sub-pixel and second sub-pixel be a red sub-pixel, a green sub-pixels and a blue subpixels wherein two.
Described first adjusts signal comprises that one first adjusts main signal and one first adjustment time signal.
The present invention also provides a kind of electro-exciting light-emitting display, comprises at least:
One substrate;
A plurality of sweep traces are arranged on the described substrate;
A plurality of data lines are arranged on the described substrate and vertical mutually with described sweep trace, and described sweep trace and data line define a plurality of pixels, comprise one first sub-pixel, one second sub-pixel and one the 3rd sub-pixel at least;
The one scan signal driving unit is electrically connected with described sweep trace, and being used for provides one first sweep signal to described first sub-pixel, second sub-pixel and three sub-pixel by described sweep trace at a picture in the display cycle;
One data-signal driver element is electrically connected with described data line, and being used for provides one first data-signal, one second data-signal and one the 3rd data-signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel respectively by described data line;
One shows signal provides the unit, is used to provide a shows signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel;
One first adjusts circuit, is electrically connected with described first sub-pixel, is used to provide one first to adjust signal to described first sub-pixel;
One second adjusts circuit, is electrically connected with described second sub-pixel, is used to provide one second to adjust signal to described second sub-pixel.
Wherein, described first adjusts signal and second adjusts the current potential discharge that signal is used for adjusting described first sub-pixel and the second sub-pixel electric capacity, and the brightness of described first sub-pixel and second sub-pixel is changed on continuity ground in the display cycle at described picture
Described first sub-pixel and second sub-pixel respectively comprise:
One switching transistor, the grid of this switching transistor is electrically connected with one of described sweep trace, and the source electrode of described switching transistor is electrically connected with one of described data line;
One driving transistors, the grid of this driving transistors is electrically connected with the drain electrode of described switching transistor, and the source electrode of described driving transistors provides the unit to be electrically connected with described shows signal;
One luminescence unit is electrically connected with the drain electrode of described driving transistors;
One adjustment unit is electrically connected with the drain electrode of described switching transistor, and correspondence and described first is adjusted circuit or the second adjustment circuit is electrically connected;
One electric capacity, an end of this electric capacity is electrically connected with the drain electrode of described switching transistor.
Described adjustment unit comprises that one adjusts transistor, this is adjusted, and transistorized source electrode and described first is adjusted circuit or the second adjustment circuit is electrically connected, the transistorized grid of described adjustment provides the unit to be electrically connected with described shows signal, and described adjustment transistor drain is electrically connected with the drain electrode of described switching transistor.
Described adjustment unit comprises that one adjusts transistor, and this is adjusted transistorized source electrode and grid and described first and adjusts circuit or the second adjustment circuit and be electrically connected and receive different potentials, and described adjustment transistor drain is electrically connected with the drain electrode of described switching transistor.
Described first sub-pixel and second sub-pixel be a red sub-pixel, a green sub-pixels and a blue subpixels wherein two.
The described first adjustment circuit and second is adjusted circuit provides one first adjustment signal and one second to adjust signal to described first sub-pixel and second sub-pixel respectively according to a predetermined luminance ratio.
Comprise that also one the 3rd adjusts circuit, be electrically connected, be used to provide one the 3rd to adjust signal to described the 3rd sub-pixel with described the 3rd sub-pixel.
Described first sub-pixel, second sub-pixel and the 3rd sub-pixel comprise:
One switching transistor, the grid of this switching transistor is electrically connected with one of described sweep trace, and the source electrode of this switching transistor is electrically connected with one of described data line;
One driving transistors, the grid of this driving transistors is electrically connected with the drain electrode of described switching transistor, and the source electrode of this driving transistors provides the unit to be electrically connected with described shows signal;
One luminescence unit is electrically connected with the drain electrode of described driving transistors;
One adjustment unit is electrically connected with the drain electrode of described switching transistor, and the corresponding and described first adjustment circuit, second adjusts circuit or the 3rd adjustment circuit is electrically connected;
One electric capacity, an end of this electric capacity is electrically connected with the drain electrode of described switching transistor.
Described adjustment unit comprises that one adjusts transistor, this is adjusted, and transistorized source electrode and described first is adjusted circuit, the second adjustment circuit or the 3rd is adjusted circuit and is electrically connected, this adjusts transistorized grid provides the unit to be electrically connected with described shows signal, and this is adjusted transistor drain and is electrically connected with the drain electrode of described switching transistor.
Described adjustment unit comprises that one adjusts transistor, this adjusts transistorized source electrode and grid and described first is adjusted circuit, the second adjustment circuit or the 3rd is adjusted circuit and is electrically connected and receives different potentials, and this is adjusted transistor drain and is electrically connected with the drain electrode of described switching transistor.
Described first sub-pixel, second sub-pixel and the 3rd sub-pixel are a red sub-pixel, a green sub-pixels and a blue subpixels.
Described first adjusts circuit, the second adjustment circuit and the 3rd adjustment circuit provides one first adjustment signal, one second adjustment signal and the 3rd to adjust signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel respectively according to a predetermined luminance ratio.
By electro-exciting light-emitting display provided by the present invention and color adjustment method thereof, can make the brightness ratio of above-mentioned a plurality of sub-pixel reality be coincident with described predetermined photochromic ratio, and can avoid the color offset phenomenon of active organic electroluminescent display.
By the present invention, make the aperture opening ratio regulate and control method that need relate to many contrapositions and optical technology difficulty in the prior art to exempt.
The present invention only need can carry out the brightness adjustment to individual other sub-pixel by the control of electric signal, to adjust the color accuracy of active organic electroluminescent display integral body.And, can utilize the manufacturing technology of the substrate that typically has thin film transistor (TFT) and circuit to realize about implementing the configuration of circuit and assembly.Be easy to incorporate in the existing manufacturing technology, so the present invention has the advantage that increases industrial competitiveness.
Description of drawings
Fig. 1 is typical organic EL component circuit diagram;
Fig. 2 A is the relevant brightness-time chart of sub-pixel of Fig. 1;
Fig. 2 B is the relevant scanning linear electric signal-time chart of sub-pixel of Fig. 1;
Fig. 3 A is the circuit diagram of electro-exciting light-emitting display one embodiment of the present invention;
Fig. 3 B is another embodiment of the present invention circuit diagram;
Fig. 4 A is the brightness-time chart of a sub-pixel
Fig. 4 B is the scanning linear electric signal-time chart of a sub-pixel;
Fig. 5 A is another embodiment of the present invention circuit diagram;
Fig. 5 B is another embodiment of the present invention circuit diagram;
Fig. 6 A is another embodiment of the present invention circuit diagram;
Fig. 6 B is another embodiment of the present invention circuit diagram.
[primary clustering symbol description]
Active organic electroluminescent display 10 sub-pixels 12,42
Organic electric exciting light-emitting diode 14 switching transistors 16,46
Driving transistors 18,48 electric capacity 20,50
First sub-pixel, 421 second sub-pixels 422
The 3rd sub-pixel 423 luminescence units 44
Data-signal driver element 520 sweep signal driver elements 540
Shows signal provides unit 560 to adjust assembly 60
First adjusts circuit 60a second adjusts circuit 60b
The 3rd adjusts circuit 60c adjusts transistor 61
Brightness b1, b2, B1 picture display cycle T1, T2
Embodiment
The invention provides a kind of electro-exciting light-emitting display and color adjustment method thereof.Please refer to Fig. 3 A, Fig. 3 A is an electro-exciting light-emitting display circuit diagram of the present invention.Electro-exciting light-emitting display 40 has a plurality of pixels 42 on a substrate 41, each pixel 42 comprises one first sub-pixel 421, one second sub-pixel 422 and one the 3rd sub-pixel 423 at least.Electro-exciting light-emitting display comprises also that on substrate 41 a plurality of sweep traces 54, a plurality of data line 52, one scan signal driving unit 540, a data-signal driver element 520, a shows signal provide unit 560, one first to adjust circuit 60a and one second and adjust circuit 60b.In one embodiment, electro-exciting light-emitting display 40 only is provided with first and adjusts the circuit 60a and the second adjustment circuit 60b; And (please refer to Fig. 3 B) in another embodiment, electro-exciting light-emitting display 40 comprises that also one the 3rd adjusts circuit 60c.
Please continue the A with reference to Fig. 3, a plurality of sweep traces 54 are arranged on the substrate 41.A plurality of data lines 52 are arranged on the substrate 41, and vertical mutually with described sweep trace 54.Sweep trace 54 and data line 52 define a plurality of pixels 42.Wherein comprise first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 at least, it is respectively applied for and shows different primary colors (primary colors), and is for example, red, blue and green.Comprise that with a pixel 42 three sub-pixels 421,422 and 423 are example explanation among the figure, but the present invention is as limit, pixel 42 can comprise four sub-pixels, for example can show redness, blueness, green and white respectively.Also can be the embodiment of six primary colors.
Sweep signal driver element 540 is electrically connected with described sweep trace 54, and being used for provides one first sweep signal to first sub-pixel 421, second sub-pixel 422 and three sub-pixel 423 by described sweep trace 54 at a picture in the display cycle.
Data-signal driver element 520 is electrically connected with described data line 52, and being used for provides one first data-signal, one second data-signal and one the 3rd data-signal to first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 respectively by described data line 52.
Shows signal provides unit 560 to provide a shows signal to first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 respectively by power lead 56.First adjusts circuit 60a is electrically connected with first sub-pixel 421, is used to provide one first to adjust signal to first sub-pixel 421.Second adjusts circuit 60b is electrically connected with second sub-pixel 422, is used to provide one second to adjust signal to second sub-pixel 422.
Wherein, first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 comprise a switching transistor 46, a driving transistors 48, a luminescence unit 44 and an electric capacity 50 respectively.The grid of switching transistor 46 is electrically connected with one of sweep trace 54.The source electrode of switching transistor 46 is electrically connected with one of described data line 52.The grid of driving transistors 48 is electrically connected with the drain electrode of switching transistor 46.The source electrode of driving transistors 48 provides unit 560 to be electrically connected with shows signal.Luminescence unit 44 is electrically connected with the drain electrode of driving transistors 48.One end of electric capacity 50 is electrically connected with the drain electrode of switching transistor 46.Wherein, luminescence unit 44 is implemented with organic electric exciting light-emitting diode (OLED).The present invention's embodiment herein belongs to a kind of active organic electroluminescent display.
(shown in Fig. 3 A) in an embodiment of the present invention can only be provided with adjustment unit 60 in first sub-pixel 421 and second sub-pixel 422.Adjustment unit 60 is electrically connected with the drain electrode of switching transistor 46, and correspondence and first is adjusted circuit 60a or the second adjustment circuit 60b is electrically connected.(shown in Fig. 3 B) in another embodiment is equipped with adjustment unit 60 in first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423.The adjustment unit 60 of first sub-pixel 421 is electrically connected on first and adjusts circuit 60a; The adjustment unit 60 of second sub-pixel 422 is electrically connected on second and adjusts circuit 60b; The adjustment unit 60 of the 3rd sub-pixel 423 is electrically connected on the 3rd and adjusts circuit 60c.
The color adjustment method of electro-exciting light-emitting display 40 provided by the present invention comprises the following steps, following step is corresponding to the embodiment of the present invention about Fig. 3 A:
First step by retouching signal driving unit 540 and scanning linear 54, provides the one scan signal to first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 at a picture in the display cycle.Like this, to open the switching transistor 46 in first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 respectively, the raceway groove of switching transistor 46 can be passed through for data-signal.
Second step by data-signal driver element 520 and data line 52, provides one first data-signal, one second data-signal and one the 3rd data-signal to first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 respectively.Like this, the current potential that makes above-mentioned each data-signal be scheduled to can be stored in electric capacity 50.
Third step provides unit 560 and power lead 56 by shows signal, and the luminescence unit 44 of a shows signal to first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 is provided.By the stored current potential among electric capacity 50 of each data-signal of above-mentioned second step, it is coupled in the grid of driving transistors 48, and adjustable shows signal offers the electric current of luminescence unit 44, like this, can make luminescence unit 44 present different brightness.
The 4th step, by above-mentioned first step, second step and third step, first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 present the brightness corresponding to first data-signal, one second data-signal and one the 3rd data-signal respectively.
At this moment, detect the brightness ratio that first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 present in the display cycle each other at described picture.
The 5th step, the described brightness ratio that foundation the 4th step records, and according to a predetermined luminance ratio, produce first and adjust the signal and the second adjustment signal, the difference corresponding first sub-pixel 421 and second sub-pixel 422.Wherein, the predetermined luminance ratio can be for example standard criterion of NTSC, and for example, when being scheduled to make pixel 42 present white, the fixed predetermined luminance ratio of TSC-system is red light brightness: green light brightness: blue light brightness is 3: 6: 1.
The 6th step, the first adjustment signal and second that provides the 5th step to be produced is adjusted signal to first sub-pixel 421 and second sub-pixel 422, the brightness of first sub-pixel 421 and second sub-pixel 422 is changed on continuity ground in the display cycle at described picture, and described change can be decline or increases.Wherein, adjust circuit 60a and second by first and adjust circuit 60b, and the adjustment unit 60 that is arranged in first sub-pixel 421 and second sub-pixel 422 realizes that above-mentioned first providing of the signal and the second adjustment signal is provided.
It should be noted that about first step, second step and third step to be used to make first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 to present brightness respectively that this three step there is no sequence limit successively.Yet, owing to carry out after the detection of brightness ratio in the 4th step, just obtain above-mentioned adjustment signal, therefore, first step, second step and third step are implemented on before the 5th step and the 6th step.
Adjust the embodiment that signal and second is adjusted signal about first of above-mentioned the 5th step generation, be described below for example:
At first, brightness ratio and predetermined luminance ratio that the 4th step is measured compare, for example, standard according to NTSC, predetermined photochromic when be white, the brightness ratio of red light (can be provided by first sub-pixel 421), green light (can be provided by second sub-pixel 422) and blue light (can be provided by the 3rd sub-pixel 423) should be 3: 6: 1; If under the brightness ratio that records was 8: 12: 1 situation, then coefficient of comparisons between the two was: 3/8,6/12,1/1, represent then to be 37.5%, 50%, 100% with the number percent form.
In the case, desire to make electro-exciting light-emitting display 40 not produce color offset phenomenon, the brightness of first sub-pixel 421 and second sub-pixel 422 need be downgraded respectively, so that first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel unit 423 can meet 3: 6: 1 NTSC standard between the three when display white.First sub-pixel 421 need come down to brightness 37.5% when not adjusting.Second sub-pixel 422 need come down to brightness 50% when not adjusting.Be not difficult to learn when three sub-pixel desires are adjusted into the brightness ratio that records when meeting the predetermined luminance ratio, wherein can have a sub-pixel need not adjust herein, this sub-pixel that need not adjust is the 3rd sub-pixel 423 in Fig. 3 A embodiment.And first sub-pixel 421 and second sub-pixel 422 be red sub-pixel, green sub-pixels and blue subpixels wherein two.
Accept the foregoing description, when the 6th step, by first adjust circuit 60a, second adjust circuit 60b and be arranged at first sub-pixel 421 with second sub-pixel 422 in adjustment unit 60 inputs first adjust the signal and the second adjustment signal.So that brightness in the picture decline of continuity ground or increase in the display cycle, reaches the purpose of display color adjustment by the adjustment of brightness ratio between the sub-pixel.
Please refer to Fig. 4 A and Fig. 4 B, and cooperate Fig. 3 A.50% second sub-pixel 422 that comes down to unadjusted brightness with above-mentioned need is an example, when the numerical value that scans signal is heightened (ON), the raceway groove of the switching transistor 46 shown in Fig. 3 A is opened, and data-signal can be stored to electric capacity 50 by data line 52, with in picture display cycle T1, turn down (OFF) afterwards scanning signal, still may command driving transistors 48 can allow the electric current that circulates.This electric current can order about luminescence unit 44 and produce the brightness that meets B1.Yet the present invention does not make brightness B1 continue in a whole image display cycle T1, but utilizes adjustment unit 60 to make the current potential that is stored in electric capacity 50 discharge, and thus, can change second sub-pixel 422 in the brightness integrated value of picture in the display cycle.Shown in Fig. 4 A, the brightness integrated value of second sub-pixel 422 can come down to 50% when not adjusting.
The embodiment of Fig. 3 A of the present invention considers that a pixel 42 had three sub-pixels at 421,422,423 o'clock, if desire is adjusted the color that it blendes together, then adjusting wherein, two sub-pixels can achieve the goal.Yet the embodiment of Fig. 3 B of the present invention has all carried out adjustment unit 60 and the layout of adjusting circuit 60a, 60b, 60c for three sub-pixels.And corresponding to the relevant color adjustment method of Fig. 3 A.The present invention and the corresponding method embodiment of Fig. 3 B are described below:
First step, second step, third step are identical with Fig. 3 A embodiment with the 4th step.
The 5th step, the described brightness ratio that foundation the 4th step records, and, produce first and adjust signal, the second adjustment signal and the 3rd adjustment signal, corresponding first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423 respectively according to a predetermined luminance ratio.
The 6th step, what provide that the 5th step produced first adjusts signal, second and adjusts signal and the 3rd tonal signal to first sub-pixel 421, second sub-pixel 422 and the 3rd sub-pixel 423, so that the brightness of first sub-pixel 421, second sub-pixel 422 is in the continuity ground decline in the display cycle of described picture.
What deserves to be mentioned is, all having carried out for three sub-pixels among adjustment unit 60 and the embodiment that adjusts circuit 60a, 60b, 60c layout at above-mentioned Fig. 3 B, still can carry out two sub-pixels that brightness is adjusted corresponding to needs, only providing first to adjust the signal and the second adjustment signal, is zero and make the 3rd signal value of adjusting signal.Another kind of embodiment makes three sub-pixel unit all carry out the brightness adjustment in fact, adjust signal, second and adjust the equal non-zero of signal value that signal and the 3rd is adjusted signal this moment first, therefore, the brightness of three sub-pixels all can the decline of continuity ground in the display cycle at picture.
Please refer to Fig. 5 A and Fig. 5 B, its demonstration corresponds respectively to another embodiment circuit diagram of the adjustment unit of Fig. 3 A and Fig. 3 B.As Fig. 5 A, adjustment unit 60 comprises that one adjusts transistor 61, source electrode and the first adjustment circuit 60a or the second adjustment circuit 60b that adjusts transistor 61 is electrically connected, the grid of adjusting transistor 61 provides unit 560 to be electrically connected with shows signal, and the drain electrode of adjusting transistor 61 is electrically connected with the drain electrode of switching transistor 46.And the embodiment of Fig. 5 B to be different from Fig. 5 A embodiment part be that the 3rd sub-pixel 423 also has adjustment unit 60, the source electrode of adjustment unit 60 and first is adjusted circuit 60a, second and is adjusted circuit 60b or the 3rd and adjust circuit 60c and be electrically connected.
Please refer to Fig. 6 A and Fig. 6 B, its demonstration corresponds respectively to another embodiment circuit diagram of the adjustment unit of Fig. 3 A and Fig. 3 B.As Fig. 6 A, adjustment unit 60 comprises that one adjusts transistor 61, the source electrode and grid and the first adjustment circuit 60a or the second adjustment circuit 60b that adjust transistor 61 are electrically connected and receive different potentials, and the drain electrode of adjusting transistor 61 is electrically connected with the drain electrode of switching transistor 46.And the embodiment of Fig. 6 B to be different from Fig. 6 A embodiment part be that the 3rd sub-pixel 423 also has adjustment unit 60, the source electrode of adjustment unit 60 and grid and first are adjusted circuit 60a, second and are adjusted circuit 60b or the 3rd and adjust circuit 60c and be electrically connected and receive different potentials.
Comprehensive the above, the invention provides a kind of color adjustment method of active organic electroluminescent display, by the present invention, the aperture opening ratio regulate and control method that need relate to many contrapositions and optical technology difficulty in the prior art can be exempted.The present invention only need can carry out the brightness adjustment to individual other sub-pixel by the control of electric signal, to adjust the color accuracy of active organic electroluminescent display integral body.And, can utilize the manufacturing technology of the substrate that typically has thin film transistor (TFT) and circuit to realize about implementing the configuration of circuit and assembly.Be easy to incorporate in the existing manufacturing technology, so the present invention has the advantage that increases industrial competitiveness.
Above specific embodiment only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (19)
1. the color adjustment method of an electro-exciting light-emitting display, it is characterized in that, described electro-exciting light-emitting display has a plurality of pixels, each pixel comprises one first sub-pixel, one second sub-pixel and one the 3rd sub-pixel at least, described first sub-pixel, second sub-pixel and the 3rd sub-pixel have an electric capacity respectively, and this method comprises:
Provide the one scan signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel in display cycle at a picture;
Provide one first data-signal, one second data-signal and one the 3rd data-signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel respectively;
Provide a shows signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel;
Detect described first sub-pixel, second sub-pixel and the 3rd sub-pixel in the brightness ratio of described picture in the display cycle;
Produce one first according to a described brightness ratio and a predetermined luminance ratio and adjust signal and respectively corresponding described first sub-pixel of one second adjustment signal and second sub-pixel;
Provide the described first adjustment signal and second to adjust signal to described first sub-pixel and second sub-pixel, to adjust the current potential discharge of electric capacity in described first sub-pixel and second sub-pixel, the brightness of described first sub-pixel and second sub-pixel is changed on continuity ground in the display cycle at described picture.
2. the color adjustment method of electro-exciting light-emitting display according to claim 1, it is characterized in that, provide the described first adjustment signal and second to adjust signal to described first sub-pixel and second sub-pixel, so that changing to continuity in the display cycle at described picture, the brightness of described first sub-pixel and second sub-pixel comprises: provide the described first adjustment signal and second to adjust signal, so that the brightness of described first sub-pixel and second sub-pixel is failed on continuity ground in the display cycle at described picture to described first sub-pixel and second sub-pixel.
3. the color adjustment method of electro-exciting light-emitting display according to claim 1, it is characterized in that described brightness ratio of foundation and predetermined luminance ratio produce the first adjustment signal and second step of adjusting corresponding respectively described first sub-pixel of signal and second sub-pixel comprises: produce the described first adjustment signal, second according to described brightness ratio and described predetermined luminance ratio and adjust signal and respectively corresponding described first sub-pixel of one the 3rd adjustment signal, second sub-pixel and the 3rd sub-pixel.
4. the color adjustment method of electro-exciting light-emitting display according to claim 3, it is characterized in that, provide the described first adjustment signal and the second adjustment signal to comprise: provide described first to adjust signal, the second adjustment signal and the 3rd adjustment signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel to the step of described first sub-pixel and second sub-pixel.
5. the color adjustment method of electro-exciting light-emitting display according to claim 1, it is characterized in that, described picture provides described first sweep signal providing described first to adjust signal and second and adjust the step of signal to described first sub-pixel and second sub-pixel to the step of described first sub-pixel, second sub-pixel and the 3rd sub-pixel in the display cycle before.
6. the color adjustment method of electro-exciting light-emitting display according to claim 1 is characterized in that, described first sub-pixel and second sub-pixel be a red sub-pixel, a green sub-pixels and a blue subpixels wherein two.
7. the color adjustment method of electro-exciting light-emitting display according to claim 1 is characterized in that, described first adjusts signal comprises that one first adjusts main signal and one first adjustment time signal.
8. an electro-exciting light-emitting display is characterized in that, comprises at least:
One substrate;
A plurality of sweep traces are arranged on the described substrate;
A plurality of data lines, be arranged on the described substrate and vertical mutually with described sweep trace, described sweep trace and data line define a plurality of pixels, each pixel comprises one first sub-pixel, one second sub-pixel and one the 3rd sub-pixel at least, and described first sub-pixel, second sub-pixel and the 3rd sub-pixel have an electric capacity respectively;
The one scan signal driving unit is electrically connected with described sweep trace, and being used for provides one first sweep signal to described first sub-pixel, second sub-pixel and three sub-pixel by described sweep trace at a picture in the display cycle;
One data-signal driver element is electrically connected with described data line, and being used for provides one first data-signal, one second data-signal and one the 3rd data-signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel respectively by described data line;
One shows signal provides the unit, is used to provide a shows signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel;
One first adjusts circuit, is electrically connected with described first sub-pixel, is used to provide one first to adjust signal to described first sub-pixel;
One second adjusts circuit, is electrically connected with described second sub-pixel, is used to provide one second to adjust signal to described second sub-pixel;
Wherein, described first adjusts signal and second adjusts the current potential discharge that signal is used for adjusting described first sub-pixel and the second sub-pixel electric capacity, and the brightness of described first sub-pixel and second sub-pixel is changed on continuity ground in the display cycle at described picture.
9. electro-exciting light-emitting display according to claim 8 is characterized in that, described first sub-pixel and second sub-pixel comprise:
One switching transistor, the grid of this switching transistor is electrically connected with one of described sweep trace, and the source electrode of described switching transistor is electrically connected with one of described data line;
One driving transistors, the grid of this driving transistors is electrically connected with the drain electrode of described switching transistor, and the source electrode of described driving transistors provides the unit to be electrically connected with described shows signal;
One luminescence unit is electrically connected with the drain electrode of described driving transistors;
One adjustment unit is electrically connected with the drain electrode of described switching transistor, and correspondence and described first is adjusted circuit or the second adjustment circuit is electrically connected.
10. electro-exciting light-emitting display according to claim 9, it is characterized in that, described adjustment unit comprises that one adjusts transistor, this is adjusted, and transistorized source electrode and described first is adjusted circuit or the second adjustment circuit is electrically connected, the transistorized grid of described adjustment provides the unit to be electrically connected with described shows signal, and described adjustment transistor drain is electrically connected with the drain electrode of described switching transistor.
11. electro-exciting light-emitting display according to claim 9, it is characterized in that, described adjustment unit comprises that one adjusts transistor, this is adjusted transistorized source electrode and grid and described first and adjusts circuit or second and adjust circuit and be electrically connected and receive different potentials, and described adjustment transistor drain is electrically connected with the drain electrode of described switching transistor.
12. electro-exciting light-emitting display according to claim 8 is characterized in that, described first sub-pixel and second sub-pixel be a red sub-pixel, a green sub-pixels and a blue subpixels wherein two.
13. electro-exciting light-emitting display according to claim 8, it is characterized in that the described first adjustment circuit and second is adjusted circuit provides one first adjustment signal and one second to adjust signal to described first sub-pixel and second sub-pixel respectively according to a predetermined luminance ratio.
14. electro-exciting light-emitting display according to claim 8 is characterized in that, comprises that also one the 3rd adjusts circuit, is electrically connected with described the 3rd sub-pixel, is used to provide one the 3rd to adjust signal to described the 3rd sub-pixel.
15. electro-exciting light-emitting display according to claim 14 is characterized in that, described first sub-pixel, second sub-pixel and the 3rd sub-pixel comprise:
One switching transistor, the grid of this switching transistor is electrically connected with one of described sweep trace, and the source electrode of this switching transistor is electrically connected with one of described data line;
One driving transistors, the grid of this driving transistors is electrically connected with the drain electrode of described switching transistor, and the source electrode of this driving transistors provides the unit to be electrically connected with described shows signal;
One luminescence unit is electrically connected with the drain electrode of described driving transistors;
One adjustment unit is electrically connected with the drain electrode of described switching transistor, and the corresponding and described first adjustment circuit, second adjusts circuit or the 3rd adjustment circuit is electrically connected.
16. electro-exciting light-emitting display according to claim 15, it is characterized in that, described adjustment unit comprises that one adjusts transistor, this is adjusted, and transistorized source electrode and described first is adjusted circuit, the second adjustment circuit or the 3rd is adjusted circuit and is electrically connected, this adjusts transistorized grid provides the unit to be electrically connected with described shows signal, and this is adjusted transistor drain and is electrically connected with the drain electrode of described switching transistor.
17. electro-exciting light-emitting display according to claim 15, it is characterized in that, described adjustment unit comprises that one adjusts transistor, this adjusts transistorized source electrode and grid and described first is adjusted circuit, the second adjustment circuit or the 3rd is adjusted circuit and is electrically connected and receives different potentials, and this is adjusted transistor drain and is electrically connected with the drain electrode of described switching transistor.
18. electro-exciting light-emitting display according to claim 14 is characterized in that, described first sub-pixel, second sub-pixel and the 3rd sub-pixel are a red sub-pixel, a green sub-pixels and a blue subpixels.
19. electro-exciting light-emitting display according to claim 14, it is characterized in that described first adjusts circuit, the second adjustment circuit and the 3rd adjustment circuit provides one first adjustment signal, one second adjustment signal and the 3rd to adjust signal to described first sub-pixel, second sub-pixel and the 3rd sub-pixel respectively according to a predetermined luminance ratio.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100877902A CN100446069C (en) | 2005-08-08 | 2005-08-08 | Color adjusting device of electroluminescence display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100877902A CN100446069C (en) | 2005-08-08 | 2005-08-08 | Color adjusting device of electroluminescence display |
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| CN1912976A CN1912976A (en) | 2007-02-14 |
| CN100446069C true CN100446069C (en) | 2008-12-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101894860A (en) * | 2010-06-17 | 2010-11-24 | 友达光电股份有限公司 | Electroluminescent display panel and pixel structure thereof |
| WO2020132806A1 (en) * | 2018-12-24 | 2020-07-02 | 深圳市柔宇科技有限公司 | Display panel, preparation method therefor, and display apparatus |
| CN110890066B (en) * | 2019-11-26 | 2021-08-03 | 深圳市华星光电半导体显示技术有限公司 | Sub-pixel circuit, pixel circuit and display device |
| TWI738281B (en) * | 2020-04-01 | 2021-09-01 | 友達光電股份有限公司 | Display panel |
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| CN1462025A (en) * | 2002-05-28 | 2003-12-17 | 友达光电股份有限公司 | Designing method of display driving circuit |
| WO2004021327A1 (en) * | 2002-08-27 | 2004-03-11 | E.I. Du Pont De Nemours And Company | Full-color electronic display with separate power supply lines |
| CN1598918A (en) * | 2003-09-19 | 2005-03-23 | 友达光电股份有限公司 | Method and device for correcting white balance of organic luminous display |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1462025A (en) * | 2002-05-28 | 2003-12-17 | 友达光电股份有限公司 | Designing method of display driving circuit |
| WO2004021327A1 (en) * | 2002-08-27 | 2004-03-11 | E.I. Du Pont De Nemours And Company | Full-color electronic display with separate power supply lines |
| CN1598918A (en) * | 2003-09-19 | 2005-03-23 | 友达光电股份有限公司 | Method and device for correcting white balance of organic luminous display |
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