CN1776933A - Organic electroluminescent display device - Google Patents
Organic electroluminescent display device Download PDFInfo
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- CN1776933A CN1776933A CN 200510124851 CN200510124851A CN1776933A CN 1776933 A CN1776933 A CN 1776933A CN 200510124851 CN200510124851 CN 200510124851 CN 200510124851 A CN200510124851 A CN 200510124851A CN 1776933 A CN1776933 A CN 1776933A
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Abstract
The display device includes first and second base plates, at least an organic electro photoluminescence device, at least an optical color change film. First and second base plates are setup in parallel and opposite. At least one organic electro photoluminescence device is setup on a base plate and between first and second base plates. At least one optical color change film is setup at first and/or second base plate. Thus, light source from the organic electro photoluminescence device will pass through the optical color change film.
Description
Technical field
The present invention relates to a kind of flat display apparatus, particularly relate to a kind of organic electroluminescence display device, when light transmittance (light utilization efficiency) to be provided, still can keep its contrast.
Background technology
(organic electroluminescent diode OELD), is a kind of emissive type element that uses organic material to organic electric exciting light-emitting diode.Need the strict brilliant requirement of length compared to traditional inorganic light-emitting diode (LED), organic electric exciting light-emitting diode can be made on the large-area substrate easily, forms noncrystalline (amorphous) film.On the other hand, Organic Light Emitting Diode also differs from lcd technology, does not need backlight module (backlight module), therefore can effectively simplify technology.Along with technology develops rapidly, following organic electric exciting light-emitting diode will be applied on the full-color display floaters of small size such as personal digital assistant, digital camera,, can extend on large-sized computer and the video screen, even be applied to flexible display during maturation in case this technology more becomes.
Typically, organic electric exciting light-emitting diode comprises: an anode, a negative electrode and be arranged at anode and negative electrode between organic luminous layer.When applying a current potential and be worse than between negative electrode and the anode, electronics can inject organic luminous layer from negative electrode.Simultaneously, organic luminous layer can be injected from anode in the hole.Afterwards, electronics can combine (recombine) again with the hole and release energy with luminous form in organic luminous layer.This kind emissive type element in the darkroom, have good contrast ratio (contrast Ratio, CR), it is defined as follows:
CR＝(L
ON+B×R)/(L
OFF+B×R)
Wherein, L
ONBrightness for the organic electroluminescence display device unlatching; L
OFFBrightness for the organic electroluminescence display device unlatching; B is the brightness of surround lighting; R is the panel reflectivity of organic electroluminescence display device.
Yet, in the time of out of doors, and extraneous emergency light reflex (B * R) strengthen, and make contrast ratio level off to 1.In order to improve this problem, general way is to set up a light polarizing film in the display floater outside, to reduce reflectivity (R).Though light polarizing film can reduce reflectivity and promote the contrast ratio of display unit when the open air, yet its penetrance is very low, about about 40%, make organic electric exciting light-emitting diode no matter indoor or outdoor, all need to drive, thereby shorten due life-span of original organic electric exciting light-emitting diode and more power consumption to be higher than original brightness.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of organic electroluminescence display device, it replaces the reflected intensity that traditional light polarizing film is controlled background light source by phototropic film/substrate, in the hope of when effectively the increase display unit contrasts, still can keep it at indoor high light transmittance under strong external light source.
According to above-mentioned purpose, the invention provides a kind of organic electroluminescence display device, comprising: first and second substrate, at least one Organic Light-Emitting Device and at least one phototropic film.First and second substrate is parallel to be oppositely arranged.Organic Light-Emitting Device is arranged on the one substrate and at least between first and second substrate.The phototropic film is arranged on first and/or second substrate, makes the light source row of Organic Light-Emitting Device through the phototropic film.
According to above-mentioned purpose, the invention provides a kind of organic electroluminescence display device again, comprising: first and second substrate and at least one Organic Light-Emitting Device.First and second substrate is parallel to be oppositely arranged.Organic Light-Emitting Device is arranged on the one substrate and at least between first and second substrate.At least one of them is the variable color substrate to first and second substrate, makes the light source row of Organic Light-Emitting Device through the variable color substrate.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, following conjunction with figs. and preferred embodiment are to illustrate in greater detail the present invention.
Description of drawings
Figure 1A to 1C is the organic electroluminescence display device generalized section that shows according to the use phototropic film of different embodiments of the invention.
Fig. 2 A to 2C shows the organic electroluminescence display device generalized section of using phototropic glass according to the tool of different embodiments of the invention.
Fig. 3 is the block schematic diagram that shows according to the organic electroluminescence display device of the active contrast compensation of having of the embodiment of the invention.
The simple symbol explanation
10,11,12,20,21,22,40～organic electroluminescence display device; 30～drive circuit; 32～optical detection device; 34～control unit; 100,200～the first substrates; 36,102,108,202,204～Organic Light-Emitting Device; 104,112～variable color film; 110,210～the second substrates; L～light source.
Embodiment
The organic electroluminescence display device that below cooperates the use phototropic film of Figure 1A to 1C explanation different embodiments of the invention.
At first, please refer to Figure 1A, organic electroluminescence display device 10 comprises: first substrate 100, second substrate 110, at least one Organic Light-Emitting Device 102 and at least one phototropic film 104.First substrate 100 and second substrate 110 are parallel and be oppositely arranged.In the present embodiment, first substrate 100 and second substrate 110 can be transparent substrates, for example glass or quartz base plate.Moreover first substrate 100 can be an active formula array base palte, can have a plurality of thin-film transistors on it, and second substrate 110 can be a filter sheet base plate, has a plurality of filters on it., be simplicity of illustration herein, only represent it with a planarizing substrate.
Organic Light-Emitting Device 102 is arranged on the upper surface of first substrate 100 and/or second substrate 110 at least, and between first substrate 100 and second substrate 110.In the present embodiment, to explain on the upper surface that is arranged at first substrate 100.Herein, substrate " upper surface " refers to the surface towards another substrate.Similarly, substrate " lower surface " refers to the surface with respect to upper surface of base plate.Organic Light-Emitting Device 102 can be a top light emitting organic electric exciting light-emitting diode or bottom-emission organic electric exciting light-emitting diode.For example, Organic Light-Emitting Device 102 is the bottom-emission organic electric exciting light-emitting diode, makes the light source L that it sent pass through its lower surface and arrive at the external world from the upper surface of first substrate 100.Generally speaking, organic electric exciting light-emitting diode comprises: an anode, a negative electrode and the organic luminous layer between anode and negative electrode, it can comprise: the hole transmission layer of a contiguous anode, the electron transfer layer of an adjacent cathodes and be arranged at hole transmission layer and electron transfer layer between luminescent layer., be simplicity of illustration herein, only represent it with a smooth block.
Next, please refer to Figure 1B, it shows organic electroluminescence display device 11 according to an embodiment of the invention, and the parts that wherein are same as Figure 1A use identical label, and omits relevant explanation.The embodiment that is different from Figure 1A, the Organic Light-Emitting Device 102 of present embodiment is a top light emitting organic electric exciting light-emitting diode, and phototropic film 104 is arranged at the lower surface of second substrate 110, makes the light source L of the Organic Light-Emitting Device 102 phototropic film 104 of can passing through.In other embodiments, phototropic film 104 can be arranged at second substrate 110 upper surface and between second substrate 110 and Organic Light-Emitting Device 102.Organic electroluminescence display device 11 according to present embodiment also possesses the described advantage as the embodiment of Figure 1A, is not given unnecessary details at this.
Next, please refer to Fig. 1 C, it shows double-sided display organic electroluminescence display device 12 according to an embodiment of the invention, and the parts that wherein are same as Figure 1A or 1B use identical label, and omits relevant explanation.In the present embodiment, double-sided display organic electroluminescence display device 12 comprises: first substrate 100, second substrate 110, Organic Light- Emitting Device 102 and 108 and phototropic film 104 and 112.Organic Light- Emitting Device 102 and 108 is arranged at respectively on the upper surface of first substrate 100 and second substrate 110, and Organic Light- Emitting Device 102 and 108 is between first substrate 100 and second substrate 110.In the present embodiment, Organic Light- Emitting Device 102 and 108 can be the bottom-emission organic electric exciting light-emitting diode.
The organic electroluminescence display device that below cooperates the use phototropic substrate of Fig. 2 A to 2C explanation different embodiments of the invention.
Please refer to Fig. 2 A, organic electroluminescence display device 20 comprises: first substrate 200, second substrate 210 and at least one Organic Light-Emitting Device 202.In the present embodiment, organic electroluminescence display device 10 as Figure 1A, first and second substrate 200 and 210 parallel being oppositely arranged, and Organic Light-Emitting Device 202, a bottom-emission organic electric exciting light-emitting diode for example, be arranged at the upper surface of first substrate 200 and between first and second substrate 200 and 210, be that first substrate 200 is the variable color substrate and be different from Figure 1A part, for example contain response type phototropic spiral piperazine (spirooxazine) substrate, contain inorganic off-color material (as WO
3) substrate etc., make the light source L of Organic Light-Emitting Device 202 first substrate 200 of passing through.In other embodiments, Organic Light-Emitting Device 202 can be a top light emitting organic electric exciting light-emitting diode, and second substrate 210 is the variable color substrate, makes the light source L of Organic Light-Emitting Device 202 second substrate 210 of passing through, shown in the organic electroluminescence display device 21 of Fig. 2 B.
Next, please refer to Fig. 2 C, it shows double-sided display organic electroluminescence display device 22 according to an embodiment of the invention, and the parts that wherein are same as Fig. 2 A or 2B use identical label.In the present embodiment, double-sided display organic electroluminescence display device 22 comprises: first substrate 200, second substrate 210 and Organic Light-Emitting Device 202 and 204.Organic Light- Emitting Device 202 and 204 is arranged at respectively on the upper surface of first substrate 200 and second substrate 210, and Organic Light- Emitting Device 202 and 204 is between first substrate 200 and second substrate 210.In the present embodiment, first substrate 200 and second substrate 210 are all the variable color substrate, and Organic Light- Emitting Device 202 and 204 is the bottom-emission organic electric exciting light-emitting diode, makes the light source L of Organic Light- Emitting Device 202 and 204 pass through respectively first substrate 200 and second substrate 210.
Similarly, also possess organic electroluminescence display device 10,11 and 12 described advantages, do not given unnecessary details at this as Figure 1A to 1C according to the organic electroluminescence display device 20,21 and 22 of the embodiment of Fig. 2 A to 2C.
Next, please refer to Fig. 3, it shows the block schematic diagram of the organic electroluminescence display device 40 of the active contrast compensation of having of the embodiment of the invention.Herein, organic electroluminescence display device 40 can use phototropic film or phototropic substrate, shown in the organic electroluminescence display device of Figure 1A, 1B, 1C, 2A, 2B or 2C, and also comprise: at least one drive circuit 30, at least one optical detection device 32 and a control unit 34.Drive circuit 30 is coupled to this at least one Organic Light-Emitting Device 36, to drive Organic Light-Emitting Device 36.Herein, Organic Light-Emitting Device 36 can be the organic electric exciting light-emitting diode of top light emitting or bottom-emission, depends on the position that phototropic film/substrate disposes and decides, and makes the light source of the organic electric exciting light-emitting diode phototropic film/substrate of can passing through.Optical detection device 32 is in order to detect extraneous light intensity.Control unit 34 is coupled between drive circuit 30 and the optical detection device 32, and the extraneous light intensity that is detected with foundation optical detection device 32 comes control Driver Circuit 30.For example, when organic electroluminescence display device 40 during in indoor use, the extraneous light intensity that optical detection device 32 is detected a little less than, thereby can downgrade the brightness of Organic Light-Emitting Device 36, to save electric power and to prolong the life-span of Organic Light-Emitting Device 36 by drive circuit 30.On the other hand, when organic electroluminescence display device 40 uses out of doors, the extraneous light intensity that optical detection device 32 is detected is stronger, thereby can increase the brightness of Organic Light-Emitting Device 36 by drive circuit 30, cooperate phototropic film/substrate to reduce extraneous emergency light reflex simultaneously, and the compensation that compares presents preferred contrast ratio (CR).
Compared to the prior art of using light polarizing film, organic electroluminescence display device of the present invention is when indoor use, because phototropic film/substrate presents transparence, so can use relatively low brightness to drive Organic Light-Emitting Device, to save its electric power and to prolong its life-span.Moreover, when using out of doors, except reaching the effect of light polarizing film, because the penetrance of phototropic film/substrate is higher than light polarizing film by phototropic film/substrate, therefore also can use relatively low brightness to drive Organic Light-Emitting Device, and save its electric power and prolong its life-span.In addition, organic electroluminescence display device of the present invention more can come the brightness of dynamic adjustments Organic Light-Emitting Device by optical detection device and control unit, comparing compensation, and presents preferred contrast ratio (CR).
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those skilled in the art can do a little change and retouching without departing from the spirit and scope of the present invention, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.
Claims (10)
1, a kind of organic electroluminescence display device comprises:
First and second substrate, this first and this second substrate is parallel is oppositely arranged;
One first Organic Light-Emitting Device, be arranged on this first substrate and between this first and this second substrate between; And
One first phototropic film, be arranged at this first or this second substrate on, make the light source row of this first Organic Light-Emitting Device through this first phototropic film.
2, organic electroluminescence display device as claimed in claim 1, also comprise one second Organic Light-Emitting Device, be arranged on this second substrate and between this first and this second substrate between, wherein the light source row of this first Organic Light-Emitting Device through direction in contrast to this second Organic Light-Emitting Device.
3, organic electroluminescence display device as claimed in claim 2, also comprise one second phototropic film, be arranged at be not provided with this first phototropic film this first or this second substrate on, make the light source row of this second Organic Light-Emitting Device through this second phototropic film.
4, organic electroluminescence display device as claimed in claim 3 also comprises:
At least one drive circuit, be coupled to this first and this second Organic Light-Emitting Device, with drive this first and this second Organic Light-Emitting Device;
At least one optical detection device is in order to detect extraneous light intensity; And
One control unit is coupled between this drive circuit and this optical detection device, to control this drive circuit according to the extraneous light intensity that this optical detection device was detected.
5, organic electroluminescence display device as claimed in claim 1 also comprises:
One drive circuit is coupled to this first Organic Light-Emitting Device, to drive this first Organic Light-Emitting Device;
One optical detection device is in order to detect extraneous light intensity; And
One control unit is coupled between this drive circuit and this optical detection device, to control this drive circuit according to the extraneous light intensity that this optical detection device was detected.
6, a kind of organic electroluminescence display device comprises:
First and second substrate, this first and this second substrate is parallel is oppositely arranged; And
One first Organic Light-Emitting Device, be arranged on this first substrate and between this first and this second substrate between;
Wherein this first and this second substrate one of them be the variable color substrate, make the light source row of this first Organic Light-Emitting Device through this variable color substrate.
7, organic electroluminescence display device as claimed in claim 6, also comprise one second Organic Light-Emitting Device, be arranged on this second substrate and between this first and this second substrate between, wherein the light source row of this first Organic Light-Emitting Device through direction in contrast to this second Organic Light-Emitting Device.
8, organic electroluminescence display device as claimed in claim 7, wherein this first and this second substrate be all the variable color substrate, make the light source of this first and second Organic Light-Emitting Device pairing those variable color substrates of passing through respectively.
9, organic electroluminescence display device as claimed in claim 8 also comprises:
At least one drive circuit, be coupled to this first and this second Organic Light-Emitting Device, with drive this first and this second Organic Light-Emitting Device;
At least one optical detection device is in order to detect extraneous light intensity; And
One control unit is coupled between this drive circuit and this optical detection device, to control this drive circuit according to the extraneous light intensity that this optical detection device was detected.
10, organic electroluminescence display device as claimed in claim 6 also comprises:
One drive circuit is coupled to this first Organic Light-Emitting Device, to drive this first Organic Light-Emitting Device;
One optical detection device is in order to detect extraneous light intensity; And
One control unit is coupled between this drive circuit and this optical detection device, to control this drive circuit according to the extraneous light intensity that this optical detection device was detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510124851 CN1776933A (en) | 2005-11-23 | 2005-11-23 | Organic electroluminescent display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510124851 CN1776933A (en) | 2005-11-23 | 2005-11-23 | Organic electroluminescent display device |
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| Publication Number | Publication Date |
|---|---|
| CN1776933A true CN1776933A (en) | 2006-05-24 |
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ID=36766317
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510124851 Pending CN1776933A (en) | 2005-11-23 | 2005-11-23 | Organic electroluminescent display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018205477A1 (en) * | 2017-05-12 | 2018-11-15 | Boe Technology Group Co., Ltd. | Organic light emitting device, display apparatus, method of controlling color temperature of light emitted from organic light emitting device, and method of fabricating organic light emitting device |
-
2005
- 2005-11-23 CN CN 200510124851 patent/CN1776933A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018205477A1 (en) * | 2017-05-12 | 2018-11-15 | Boe Technology Group Co., Ltd. | Organic light emitting device, display apparatus, method of controlling color temperature of light emitted from organic light emitting device, and method of fabricating organic light emitting device |
| US10811473B2 (en) | 2017-05-12 | 2020-10-20 | Boe Technology Group Co., Ltd. | Organic light emitting device, display apparatus, method of controlling color temperature of light emitted from organic light emitting device, and method of fabricating organic light emitting device |
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