CN103971629A - Organic electroluminescent display device - Google Patents
Organic electroluminescent display device Download PDFInfo
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- CN103971629A CN103971629A CN201310029570.9A CN201310029570A CN103971629A CN 103971629 A CN103971629 A CN 103971629A CN 201310029570 A CN201310029570 A CN 201310029570A CN 103971629 A CN103971629 A CN 103971629A
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Abstract
The invention discloses an organic electroluminescent display device. The organic electroluminescent display device comprises an organic luminescent structure, a backlight module and a light control structure. The organic luminescent structure comprises a first electrode, a second electrode, an organic luminescent layer and a light current sensitive layer. The first electrode and the second electrode are arranged correspondingly. The organic luminescent layer is arranged between the first electrode and the second electrode. The light current sensitive layer is arranged between the organic luminescent layer and the first electrode. The backlight module is arranged corresponding to the organic luminescent structure and used for providing light for the organic luminescent structure. The light current sensitive layer is used for absorbing the light provided by the backlight module and generating currents to drive the organic luminescent layer. The light control structure is arranged between the backlight module and the organic luminescent structure and used for controlling the amount of light, entering the organic luminescent structure, provided by the backlight module.
Description
Technical field
The present invention relates to a kind of display of organic electroluminescence, particularly a kind of utilize photocurrent sensitive layer that the light that provides of backlight is provided and generation current in order to drive the display of organic electroluminescence of organic luminous layer.
Background technology
Electroluminescent display (electroluminescent display device) can not need colored filter (color filter) owing to having, not need the characteristic such as backlight module and low power consumption, and be all regarded as replacing liquid crystal display becomes next display technique main flow from generation to generation all the time.And in the middle of various electroluminescent displaies, display of organic electroluminescence is to be proven technique relatively at present.
In general display of organic electroluminescence, owing to driving luminous organic material with current system, therefore provide the stability requirement of electric current higher for driven unit.But in industry, more common driven unit comprises amorphous silicon film transistor (amorphous silicon TFT, a-Si TFT) and polycrystalline SiTFT (poly silicon TFT) at present.Wherein amorphous silicon film transistor, owing to having advantages of that manufacturing process technology maturation and qualification rate are high, is still the main flow in display industry at present.But the critical voltage of amorphous silicon film transistor skew (threshold voltage shift) phenomenon is serious, is not suitable for for driving luminous organic material.Relatively, although polycrystalline SiTFT has good critical voltage skew performance, but still need the circuit design of arranging in pairs or groups as two transistor and an electric capacity (2T1C) by more complicated compensating circuit design example to drive luminous organic material, therefore still cause the negative effect for the aspect such as qualification rate and aperture opening ratio.In addition, cause the not good problem of crystallization degree homogeneity to exist because the manufacturing process of polycrystalline SiTFT is complicated and have crystallization process in the time that larger size panel apply, be difficult for the problem such as large area and high cost therefore current polycrystalline SiTFT also exists.
Summary of the invention
Object of the present invention is providing a kind of display of organic electroluminescence, the light quantity that the light that utilizes fader control structure control backlight to produce enters photocurrent sensitive layer, and then control the photocurrent size that photocurrent sensitive layer produces because absorbing light, and drive organic luminous layer whereby and produce display effect.
The invention provides a kind of display of organic electroluminescence, comprise an organic light-emitting structure, a backlight module and a fader control structure.Organic light-emitting structure comprises one first electrode, one second electrode, an organic luminous layer and a photocurrent sensitive layer.The first electrode and the second electrode pair should arrange.Organic luminous layer is arranged between the first electrode and the second electrode.Photocurrent sensitive layer is arranged between organic luminous layer and the first electrode.Backlight module setting corresponding to organic light-emitting structure, in order to provide a light to organic light-emitting structure.Photocurrent sensitive layer is to absorb the light that backlight module provides and produce an electric current to drive organic luminous layer.Fader control structure is arranged between backlight module and organic light-emitting structure, and the light quantity size of organic light-emitting structure is provided in order to the light of controlling backlight module and providing.
Brief description of the drawings
Figure 1 shows that the schematic diagram of the display of organic electroluminescence of first preferred embodiment of the invention.
Figure 2 shows that the schematic diagram of the display of organic electroluminescence of second preferred embodiment of the invention.
Figure 3 shows that the demonstration situation schematic diagram of the display of organic electroluminescence of second preferred embodiment of the invention.
Figure 4 shows that the schematic diagram of the display of organic electroluminescence of third preferred embodiment of the invention.
Figure 5 shows that the schematic diagram of the display of organic electroluminescence of four preferred embodiment of the invention.
Figure 6 shows that the schematic diagram of the display of organic electroluminescence of fifth preferred embodiment of the invention.
Figure 7 shows that the schematic diagram of the display of organic electroluminescence of sixth preferred embodiment of the invention.
Wherein, description of reference numerals is as follows:
Embodiment
Can further understand the present invention for making to have the knack of those skilled in the art, below spy enumerates several preferred embodiment of the present invention, and coordinates accompanying drawing, describes constitution content of the present invention in detail.
Please refer to Fig. 1.Figure 1 shows that the schematic diagram of the display of organic electroluminescence of first preferred embodiment of the invention.For convenience of description, each accompanying drawing of the present invention is only for signal is in order to easy understanding the present invention, and its detailed ratio can be adjusted according to the demand of design.As shown in Figure 1, the present embodiment provides a display of organic electroluminescence 100, comprises an organic light-emitting structure 110, a backlight module 120 and a fader control structure 130.Organic light-emitting structure 110 comprises one first electrode 111, one second electrode 112, an organic luminous layer 113 and a photocurrent sensitive layer 114.The first electrode 111 is and the corresponding setting of the second electrode 112.First electrode 111 of the present embodiment is preferably an anode electrode, and the second electrode 112 is preferably a cathode electrode, but not as limit.For instance, in other preferred embodiments of the present invention also viewable design need to make the first electrode 111 be a cathode electrode, and to make the second electrode 112 be an anode electrode.Organic luminous layer 113 is arranged between the first electrode 111 and the second electrode 112.Photocurrent sensitive layer 114 is arranged between organic luminous layer 113 and the first electrode 111.Backlight module 120 is settings corresponding to organic light-emitting structure 110, in order to provide a light L to organic light-emitting structure 110.The backlight module 120 of the present embodiment can comprise a side-light backlight module or a down straight aphototropism mode set, but not as limit.Photocurrent sensitive layer 114 is to absorb light L and therefore produce an electric current to drive organic luminous layer 113.That is to say, the light L that backlight module 120 provides can be absorbed by photocurrent sensitive layer 114 and produce an electric current to drive organic luminous layer 113 to produce a demonstration light DL.Also please note, the present invention is not limited with the stacking order of above-mentioned the first electrode 111, the second electrode 112, organic luminous layer 113 and photocurrent sensitive layer 114, also can optionally adjust the stacking order of the first electrode, the second electrode, organic luminous layer and photocurrent sensitive layer in other preferred embodiments of the present invention.
What deserves to be explained is, the backlight module 120 of the present embodiment can comprise for example infrared ray backlight module of a non-visible light backlight module, and light L can comprise such as infrared ray of a non-visible light, shows light DL in order to avoid having influence on, but not as limit.In addition, fader control structure 130 is arranged between backlight module 120 and organic light-emitting structure 110, enters the light quantity of organic light-emitting structure 110 and the size of current that photocurrent sensitive layer 114 produces in order to the light L that controls backlight module 120 and provide.In other words, enter the light quantity of the light L of photocurrent sensitive layer 114 by fader control structure 130 capable of regulatings, with produce the different demonstration light DL of bright-dark degree so that photocurrent sensitive layer 114 can produce that different size of current drives organic luminous layer 113.In the present embodiment, light amount control device 130 can comprise a micro electronmechanical shutter (MEMS shutter) device, a liquid crystal board, an electric moistening plate, an electrochromic device or other applicable light amount control devices.In addition, organic light-emitting structure 110 can also comprise a hole transmission layer 115 and an electron transfer layer 116, be separately positioned between organic luminous layer 113 and photocurrent sensitive layer 114 and be arranged on organic luminous layer 113 and the second electrode 112 between, but the present invention is not as limit.In other preferred embodiments of the present invention, also viewable design need to arrange hole injection layer and other required material layer in organic light-emitting structure 110, in order to adjust the luminosity of organic light-emitting structure 110.Also please note, in the time that backlight module 120 is an infrared ray backlight module, photocurrent sensitive layer 114 can comprise for example Tin Phthalocyanine of photocurrent sensitive material (tin phthalocyanine, SnPc) or the composite material (SnPc:C60Mixed film) of Tin Phthalocyanine and carbon 60 (C60), but not as limit.In other preferred embodiments of the present invention, the different in kind of the light L that also visual backlight module 120 produces is adjusted the constituent of photocurrent sensitive layer 114, in order to reach required photocurrent effect.
Below will describe for the different sample states of implementing of the present invention, and be simplified illustration, below explanation is described in detail mainly for the different part of each embodiment, and no longer identical part is repeated.In addition, in various embodiments of the present invention, identical assembly is to indicate with identical label, checks one against another between each embodiment in order to convenient.
Please refer to Fig. 2 and Fig. 3.Figure 2 shows that the schematic diagram of the display of organic electroluminescence of second preferred embodiment of the invention.Figure 3 shows that the demonstration situation schematic diagram of the display of organic electroluminescence of the present embodiment.As shown in Figure 2, the second preferred embodiment of the present invention provides a display of organic electroluminescence 200, comprises an organic light-emitting structure 210, a backlight module 220 and a fader control structure 230.The places different from above-mentioned the first preferred embodiment are, display of organic electroluminescence 200 has multiple sub-pixel area PX, organic luminous layer 113 in organic light-emitting structure 210 comprises that multiple organic light-emitting units EM are separately positioned in each sub-pixel area PX, in order to produce the demonstration light of different colours, but not as limit.For instance, sub-pixel area PX can comprise one first sub-pixel area PXA, one second sub-pixel area PXB and the adjacent setting of one the 3rd sub-pixel area PXC, and organic light-emitting units EM can comprise that one first organic light-emitting units EM1, one second organic light-emitting units EM2 and one the 3rd organic light-emitting units EM3 are separately positioned in the first sub-pixel area PXA, the second sub-pixel area PXB and the 3rd sub-pixel area PXC.The first organic light-emitting units EM1, the second organic light-emitting units EM2 and the 3rd organic light-emitting units EM3 can be respectively a red organic light-emitting units, a green organic light-emitting units and a blue organic light-emitting units, in order to make respectively the first sub-pixel area PXA, the second sub-pixel area PXB and the 3rd sub-pixel area PXC can produce respectively red light, green light and blue light, and reach the effect of full-color demonstration by colour mixture.In addition, in the organic light-emitting structure 210 of the present embodiment, photocurrent sensitive layer 114 preferably includes multiple photocurrent sensing unit 114S and is separately positioned in each sub-pixel area PX, and each photocurrent sensing unit 114S is preferably electrically isolated from one, in order to avoid the photocurrent sensitive layer 114 in each sub-pixel area PX to interfere with each other impact, but not as limit.The each sub-pixel area PX of the present embodiment can share one first electrode 111 and one second electrode 112, reaches simplified structure and the effect of simplifying type of drive.
The fader control structure 230 of the present embodiment is preferably a micro electronmechanical shutter device, and fader control structure 230 have multiple subelements 233 respectively correspondence be arranged in each sub-pixel area PX, enter the light quantity size of corresponding each photocurrent sensing unit 114S in order to the light being provided by backlight module 220 in each sub-pixel area PX to be provided.For instance, the fader control structure 230 of the present embodiment can comprise substrate 232 in substrate 231,, a reflecting plate 230R, multiple shield 230S and multiple changeover module T.Reflecting plate 230R, shield 230S and changeover module T are arranged between lower substrate 231 and upper substrate 232, and reflecting plate 230R is the light being provided by backlight module 220 in order to shaded portions and defines maximum open (aperture) size in each subelement 233.Shield 230S and changeover module T are separately positioned in each subelement 233, control the position of each shield 230S on a horizontal direction X by each changeover module T, and then change the openings of sizes in each subelement 233.As shown in Figure 3, the backlight module 220 of the present embodiment is with the side-light backlight module explanation of arranging in pairs or groups, but not as limit.Backlight module 220 can comprise that a light source 220S is arranged on a side, the light being produced by light source 220S can be by the vertical direction Y that leads substantially of the reflecting surface 220R in backlight module 220, and shield 230S in each subelement 233 change in location on X can be in order to control the light quantity size that in each subelement 233, light can enter each photocurrent sensing unit 114S through fader control structure 230 in the horizontal direction.For instance, situation as shown in Figure 3, wherein the shield 230S in the first sub-pixel area PXA and the 3rd sub-pixel area PXC is the skew of turning right, making not to be reflected on Y in the vertical direction part that plate 230R covers is not also covered by shield 230S and presents an opening, therefore directive the first sub-pixel area PXA can pass respectively subelement 233 and enter corresponding photocurrent sensing unit 114S with light L3 with the light L1 of the subelement 233 of the 3rd sub-pixel area PXC, therefore can make photocurrent sensing unit 114S produce photocurrent and drive respectively the first organic light-emitting units EM1 and the 3rd organic light-emitting units EM3, and then make the first sub-pixel area PXA and the 3rd sub-pixel area PXC can produce respectively a demonstration light DL1 and a demonstration light DL3.
Relatively, as shown in Figure 3, shield 230S in the second sub-pixel area PXC skew of can turning left, make not to be reflected on Y in the vertical direction the part that plate 230R covers and can be covered by shield 230S and present a closed condition, therefore the light L2 of the subelement 233 of a directive second sub-pixel area PXB cannot can not produced the photocurrent sensing unit 114S of the second sub-pixel area PXC through subelement 233 light by backlight module 220 is irradiated to.In other words, can change the openings of sizes in each subelement 233 by shield 230S skew situation in position, therefore can adjust whereby the light quantity that enters each photocurrent sensing unit 114S, with so that photocurrent sensing unit 114S can produce different size of current drives each organic light-emitting units EM and produce the different demonstration light of bright-dark degree.The reflecting plate 230R that also note that the present embodiment also can be in order to reclaim the not light of directive organic light-emitting structure 210 (as the light L3 in Fig. 3), and then reach the effect that improves whole lighting efficiency.The each changeover module T that also note that the present embodiment can comprise that a thin film transistor (TFT) is arranged in substrate 232, in order to form an array substrate 232A, but not as limit.In other words, light amount control device 230 can comprise an array substrate 232A, and array substrate 232A comprises multiple changeover module T, enters the light quantity size of organic light-emitting structure 210 in order to control respectively light that each subelement 233 allows backlight module 220 to produce.Because changeover module T herein controls the shield 230S position on X in the horizontal direction, thus can utilize for example amorphous silicon film transistor to form changeover module T, and then reach simplified manufacturing technique and the effect reducing costs.
Please refer to Fig. 4.Figure 4 shows that the schematic diagram of the display of organic electroluminescence of third preferred embodiment of the invention.As shown in Figure 4, the present embodiment provides a display of organic electroluminescence 300, comprises an organic light-emitting structure 310, backlight module 120 and fader control structure 230.The places different from above-mentioned the second preferred embodiment are, in organic light-emitting structure 310, the first electrode 111 comprises that multiple the first sub-electrode 111S are separately positioned in each sub-pixel area PX, and each the first sub-electrode 111S is preferably electrically isolated from one.Therefore, the voltage condition in each sub-pixel area PX of the present embodiment between the first sub-electrode 111S and the second electrode 112 can be controlled respectively, and then the demonstration situation of each sub-pixel area PX can be accurately controlled.The display of organic electroluminescence 300 of the present embodiment is except the first sub-electrode 111S, and feature, material behavior and the display mode of all the other each parts is similar to above-mentioned the second preferred embodiment, therefore at this and repeat no more.
Please refer to Fig. 5.Figure 5 shows that the schematic diagram of the display of organic electroluminescence of four preferred embodiment of the invention.As shown in Figure 5, the present embodiment provides a display of organic electroluminescence 400, comprises an organic light-emitting structure 410, backlight module 120 and fader control structure 230.The places different from above-mentioned the 3rd preferred embodiment are, in organic light-emitting structure 410, the second electrode 112 comprises that multiple the second sub-electrode 112S are separately positioned in each sub-pixel area PX, and each the second sub-electrode 112S is preferably electrically isolated from one.Therefore, the voltage condition in each sub-pixel area PX of the present embodiment between the first sub-electrode 111S and the second sub-electrode 112S can be controlled respectively, and then the demonstration situation of each sub-pixel area PX can be accurately controlled.The display of organic electroluminescence 400 of the present embodiment is except the second sub-electrode 112S, and feature, material behavior and the display mode of all the other each parts is similar to above-mentioned the 3rd preferred embodiment, therefore at this and repeat no more.
Please refer to Fig. 6.Figure 6 shows that the schematic diagram of the display of organic electroluminescence of fifth preferred embodiment of the invention.As shown in Figure 6, the present embodiment provides a display of organic electroluminescence 500, comprises organic light-emitting structure 210, backlight module 120 and a fader control structure 530.The places different from above-mentioned the second preferred embodiment are, the fader control structure 530 of the present embodiment is preferably a liquid crystal board, and fader control structure 530 can have multiple subelements 533 respectively correspondence be arranged in each sub-pixel area PX, enter the light quantity size of corresponding each photocurrent sensing unit 114S in order to the light being provided by backlight module 120 in each sub-pixel area PX to be provided.For instance, the fader control structure 530 of the present embodiment can comprise in substrate 531, that substrate 532 and a liquid crystal layer 534 are arranged between lower substrate 531 and upper substrate 532.Upper substrate 531 and lower substrate 532 wherein one at least can be an array substrate, drive respectively whereby the liquid crystal layer in each subelement 533, and then reach the light quantity size of controlling each subelement 533 light of allowing backlight module 120 to produce and enter organic light-emitting structure 210.The display of organic electroluminescence 500 of the present embodiment is except amount control structure 530, and feature, material behavior and the display mode of all the other each parts is similar to above-mentioned the second preferred embodiment, therefore at this and repeat no more.
Please refer to Fig. 7.Figure 7 shows that the schematic diagram of the display of organic electroluminescence of sixth preferred embodiment of the invention.As shown in Figure 7, the present embodiment provides a display of organic electroluminescence 600, comprises organic light-emitting structure 310, backlight module 120 and fader control structure 530.The places different from above-mentioned the 5th preferred embodiment are, in organic light-emitting structure 310, the first electrode 111 comprises that multiple the first sub-electrode 111S are separately positioned in each sub-pixel area PX, and each the first sub-electrode 111S is preferably electrically isolated from one.Therefore, the voltage condition in each sub-pixel area PX of the present embodiment between the first sub-electrode 111S and the second electrode 112 can be controlled respectively, and then the demonstration situation of each sub-pixel area PX can be accurately controlled.The display of organic electroluminescence 600 of the present embodiment is except the first sub-electrode 111S, and feature, material behavior and the display mode of all the other each parts is similar to above-mentioned the 5th preferred embodiment, therefore at this and repeat no more.
Comprehensive the above, display of organic electroluminescence of the present invention is the light quantity that the light that utilizes fader control structure control backlight module to produce enters photocurrent sensitive layer, and then control the photocurrent size that photocurrent sensitive layer produces because absorbing light, and utilize this photocurrent to drive organic luminous layer and produce display effect.In addition, the present invention also utilizes micro electronmechanical shutter device or a liquid crystal board to form above-mentioned fader control structure, thus can not need to drive with the more complicated polycrystalline SiTFT of manufacturing process, thereby can reach cost and effect that can large area.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a display of organic electroluminescence, is characterized in that, comprising:
One organic light-emitting structure, comprising:
One first electrode;
One second electrode, should arrange with this first electrode pair;
One organic luminous layer, is arranged between this first electrode and this second electrode; And
One photocurrent sensitive layer, is arranged between this organic luminous layer and this first electrode;
One backlight module, setting corresponding to this organic light-emitting structure, in order to provide a light to this organic light-emitting structure, wherein this photocurrent sensitive layer is to absorb this light and produce an electric current and drive this organic luminous layer; And
One fader control structure, is arranged between this backlight module and this organic light-emitting structure, enters the light quantity size of this organic light-emitting structure in order to control this light.
2. display of organic electroluminescence according to claim 1, is characterized in that, this backlight module comprises an infrared ray backlight module, and this light comprises an infrared ray.
3. display of organic electroluminescence according to claim 1, is characterized in that, this light amount control device comprises a micro electronmechanical shutter device or a liquid crystal board.
4. display of organic electroluminescence according to claim 1, is characterized in that, this display of organic electroluminescence has multiple sub-pixel area, and this fader control structure has multiple subelements and is separately positioned in those sub-pixel area.
5. display of organic electroluminescence according to claim 4, it is characterized in that, this light amount control device comprises an array substrate, and this array substrate comprises multiple changeover modules, allows this light to enter the light quantity size of this organic light-emitting structure in order to control respectively respectively this subelement.
6. display of organic electroluminescence according to claim 5, is characterized in that, respectively this changeover module comprises a thin film transistor (TFT).
7. display of organic electroluminescence according to claim 4, is characterized in that, this photocurrent sensitive layer comprises that multiple photocurrent sensing units are separately positioned in those sub-pixel area.
8. display of organic electroluminescence according to claim 1, is characterized in that, this first electrode is anode electrode, and this second electrode is cathode electrode.
9. display of organic electroluminescence according to claim 4, is characterized in that, this first electrode comprises that multiple the first sub-electrodes are separately positioned in those sub-pixel area.
10. display of organic electroluminescence according to claim 8, is characterized in that, this organic light-emitting structure also comprises:
One hole transmission layer, is arranged between this organic luminous layer and this photocurrent sensitive layer; And
One electron transfer layer, is arranged between this organic luminous layer and this second electrode.
11. display of organic electroluminescence according to claim 1, is characterized in that, this photocurrent sensitive layer comprises the composite material of Tin Phthalocyanine or Tin Phthalocyanine and carbon 60.
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| CN201310029570.9A CN103971629A (en) | 2013-01-25 | 2013-01-25 | Organic electroluminescent display device |
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| CN201310029570.9A CN103971629A (en) | 2013-01-25 | 2013-01-25 | Organic electroluminescent display device |
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Application publication date: 20140806 |