CN103325809A - Organic luminous display device - Google Patents
Organic luminous display device Download PDFInfo
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- CN103325809A CN103325809A CN2012100778019A CN201210077801A CN103325809A CN 103325809 A CN103325809 A CN 103325809A CN 2012100778019 A CN2012100778019 A CN 2012100778019A CN 201210077801 A CN201210077801 A CN 201210077801A CN 103325809 A CN103325809 A CN 103325809A
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Abstract
The invention provides an organic luminous display device which comprises a plurality of pixels distributed in an array mode. Each pixel comprises a white sub pixel and a plurality of colored sub pixels. Each white sub pixel is provided with a diffusion unit, wherein each diffusion unit is provided with an insulating and light-pervious body and a plurality of micro structures arranged in the body. Light paths are interfered through the micro structures of the diffusion units, light diffusion effects are improved, mirror image reflection problems of the white sub pixels can be effectively reduced, advancing routes of light rays in a colored sub pixel area are not influenced, and visuality of the device in an environmental light source can be improved.
Description
Technical field
The present invention relates to a kind of display unit, refer to a kind of organic light-emitting display device that lowers mirror reflection especially.
Background technology
Be used for the full-color organic light emitting display of development (hereinafter to be referred as OLED) at present and roughly can be divided into three kinds of modes: (1) utilizes the light emitting source that can send redness (R), green (G), blue (B) three kinds of coloured light respectively and obtains Full-color OLED, (2) utilize the blue-light-emitting source to cooperate with converting unit of the same colour and obtain Full-color OLED, (3) utilize white light source to cooperate with the filter unit that contains R, G, B chromatic filter layer and obtain Full-color OLED.And wherein, the mode comparison that utilizes white light source to cooperate with filter unit and obtain the mode of Full-color OLED and send R, G, three kinds of coloured light of B respectively, its OLED evaporation processing procedure is comparatively easy, produce yield than higher, and can obtain the white light of greater efficiency, therefore be the simplest mode of development Full-color OLED.
Consult Fig. 1, be a kind of bottom-emission (bottom emitting), and utilize white light source and to contain redness, green, the colored light-filtering units of blue color filter layer cooperates and the structural representation (only showing one of them pixel among Fig. 1) of the organic light emitting display that obtains, this organic light emitting display comprises a transparency carrier 11, one is formed at the filter unit 12 on these substrate 11 surfaces, one is formed at the transparent anode 13 on this filter unit 12, one is formed on this transparent anode 13 and can sends the luminescence unit 14 of white light, reaching one is formed on this luminescence unit 14, the negative electrode 15 that is constituted by metal, this filter unit 12 has a plurality of red filter layer 121 of arranging with array way, green filter layer 122, blue color filter layer 123 reaches the transparent area 124 that does not have filter layer; When this two electrodes certainly (negative electrode 15 and anode 13) when applying bias voltage, electronics and hole are injected this luminescence unit 14 and are also outwards sent white light in these luminescence unit 14 combinations from this negative electrode 15 and anode 13 respectively, and the white light that outwards sends is by the red filter layer 121 of this filter unit 12, green filter layer 122, blue color filter layer 123, and can outwards send ruddiness respectively behind the transparent area 124, green glow, blue light, and white light, this each can send white light zone definitions be white sub-pixels (hereinafter to be referred as the W sub-pixel), this each can send ruddiness, green glow, and the zone of blue light then is defined as red sub-pixel (hereinafter to be referred as the R sub-pixel) respectively, green sub-pixels (hereinafter to be referred as the G sub-pixel), and blue subpixels (hereinafter to be referred as the B sub-pixel), and a W sub-pixel and each R, G, the B sub-pixel then defines one of them pixel of this organic light emitting display jointly.
Yet, because the negative electrode 15 of this OLED is to be made of easy reflective metal, therefore, when the user in using this display, and when the incident light 100 of extraneous incident is incident to this OLED by this transparent glass substrate 11, because the position of corresponding described white sub-pixels does not have filter layer, can any effect of blocking not arranged to this negative electrode 15, so incident light 100 can directly pass described transparent area 124 and directly be reflected by this negative electrode 15, and can cause the user in the process of using this OLED, can influence the user in the screen formation inverted image of this display because of the reflection (being so-called mirror reflection) of the negative electrode 15 external incident lights 100 in corresponding white sub-pixels zone watches, general organic light emitting display as shown in Figure 1, its scattered reflection is about 0.62%, its mirror reflection then is about 24.5%, shows that the problem of mirror reflection is serious.
Consult Fig. 2, in order to solve aforementioned OLED in the mirror reflection problem in described white sub-pixels zone, there is the dealer to utilize that the resin with light-permeable forms a resin bed 125 in described transparent area 124 positions, utilize this resin bed 125 to lower to the reflected intensity from the incident light 100 of extraneous incident, to improve the mirror reflection problem in described white sub-pixels zone; Or as shown in Figure 3, directly directly stick one deck optical diffusion film 16 at this glass substrate 11 away from the surface of this filter unit 12, utilize this optical diffusion film 16 to lower incident light 100 and to enter the probability in described white sub-pixels zone to improve the mirror reflection problem from the light diffusion in advance of extraneous incident.And by the result of the OLED mirror reflection after the aforementioned structure improvement as can be known, its mirror reflection can be down to 11.9% (Fig. 2) and and 4.61% (Fig. 3) respectively by 24.5% (Fig. 1).
Yet aforementioned this resin bed 125 that forms with light-transmissive resin though can reduce reflected intensity, because this incident light 100 still can directly be sent by these negative electrode 15 metallic reflections, therefore improves limited to the mirror reflection problem; And utilize this optical diffusion film 16 to lower the method for mirror reflection, though can effectively reduce the problem of minute surface reflection, but scattered reflection but can be increased to 1.47% (Fig. 3) by 0.62% (Fig. 1), this is because this optical diffusion film 16 is to be attached to this glass substrate 11 surfaces comprehensively, therefore, the light that not only correspondence can be incident to described transparent area 124 positions spreads, also correspondence can be incident to described redness simultaneously, green, blue color filter layer 121,122,123 light diffusion, can further cause R on the contrary, G, the scattered reflection of B subpixel area increases, and causes the problem that reduces in the contrast of environment light source lower panel.
Summary of the invention
The object of the present invention is to provide a kind of can be in order to reduce minute surface reflection and not influence the organic light-emitting display device of color sub-pixel scattered reflection.So, a kind of organic light-emitting display device of the present invention comprises a plurality of pixels of arranging with array way, this each pixel comprises a white sub-pixels and a plurality of color sub-pixel, wherein, this each white sub-pixels has a diffusion unit, this diffusion unit has the body of an insulation and printing opacity, and a plurality of micro-structurals that are arranged on this body.
Preferably, aforementioned this organic light-emitting display device, wherein, described micro-structural is to be scattered in to be formed in this body, is selected from particle diameter and constitutes between the particulate of 0.1～1 μ m.
Preferably, aforementioned this organic light-emitting display device, wherein, described particulate is made of light transmissive material.
Preferably, aforementioned this organic light-emitting display device, wherein, the constituent material of described particulate is selected from acryl, poly-silica, and an aforementioned wherein combination.
Preferably, aforementioned this organic light-emitting display device, wherein, described micro-structural is to utilize laser microscopic carvings mode to be formed at this body.
Preferably, aforementioned this organic light-emitting display device, wherein, described micro-structural is pyramid, or has irregular surface.
Preferably, aforementioned this organic light-emitting display device, wherein, this micro-structural is to utilize laser microscopic carvings mode to be formed at this body, and is identical with this body constituent material but have different crystalline forms.
Preferably, aforementioned this liquid crystal indicator, wherein, the constituent material of this body is selected from acrylic acid, polyimides, and polyamide.
Preferably, aforementioned this liquid crystal indicator, wherein, the light transmittance of this body can reach more than 50%.
Preferably, aforementioned this liquid crystal indicator, wherein, described particulate is made of light-proof material.
Beneficial effect of the present invention is: utilize should a diffusion unit being set the white sub-pixels position, not only can utilize the micro-structural stray light path of this diffusion unit, promote the light diffusion effect and can effectively lower the mirror reflection problem of described white sub-pixels, and do not influence light in the course in described color sub-pixel zone, and can be lifted at the visuality under the environment light source.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the known schematic diagram with OLED structure of white light source and colored light-filtering units of explanation;
Fig. 2 is the schematic diagram that the OLED structure of key diagram 1 also has a resin bed;
Fig. 3 is the schematic diagram that the OLED structure of key diagram 1 also has an optical diffusion film;
Fig. 4 is the schematic diagram of the preferred embodiment of explanation explanation organic light emitting display of the present invention.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
Consult Fig. 4, one preferred embodiment of organic light-emitting display device of the present invention, present embodiment is that the structure of the OLED of a bottom-emission (bottom emitted) is the example explanation, this organic light-emitting display device comprises: one first substrate 2, a filter unit 3, a luminescence unit 4, and one second electrode 5.
This first substrate 2 has the insulating barrier 22 that a slice transmitting substrate 21, is formed at these transmitting substrate 21 surfaces, a plurality of control elements 23 in order to the signal of telecommunication to be provided, reach one and be arranged at this insulating barrier 22 tops, and first electrode 24 that is electrically connected with described control element 23.
Detailed says, this transparent substrates 21 can be selected from light transmissive materials such as glass or quartz, this insulating barrier 22 is selected from silica, silicon nitride, or transparent insulation material such as silicon oxynitride, described control element 23 can be thin-film transistor, this first electrode 24 is anode, and can be selected from transparent conductive materials such as ITO, ZnO, AZO and constitute, be that therefore emphasis of the present invention no longer adds narration because each prong material of this first substrate 2 is chosen as the art institute known and non-.
This filter unit 3 is located between this insulating barrier 22 and this first electrode 24 and defines a plurality of pixels, and this each pixel has white sub-pixels and a plurality of color sub-pixel that can send white light, is R, G, the B sub-pixel that can send ruddiness, green glow, blue light respectively in color sub-pixel described in the present embodiment.
Specifically, this filter unit 3 has a plurality of white light photic zones of arranging with array way 31, red filter layer 32, green filter layer 33, and blue color filter layer 34, the light that this luminescence unit 4 sends is by described white light photic zone 31, red filter layer 32, green filter layer 33, can outwards send white light respectively after the blue color filter layer 34, ruddiness, green glow, and blue light, this each can send white light zone definitions be the W sub-pixel, this each can send ruddiness, green glow, and the zone of blue light then is defined as the R sub-pixel respectively, the G sub-pixel, and the B sub-pixel, this each pixel then is by a W sub-pixel and each R, G, the B sub-pixel defines jointly.
Aforementioned described redness, green, and blue color filter layer 32,33,34 preparation be earlier with a photoresist respectively with red, green, reach and get via lithographic process again after blue pigment makes the photoresist composition with different colours, because this redness, green, and blue color filter layer 32,33,34 one-tenth is grouped into and the processing procedure mode of being correlated with is known so no longer add to give unnecessary details by the art.
Specifically, the present invention defines the white light photic zone 31 of this W sub-pixel can be in order to stray light path or light-absorbing diffusion unit for having one, this diffusion unit has the body 311 of an insulation and printing opacity, and a plurality of micro-structurals 312 that are arranged at this body 311.
This body 311 is selected from acrylic acid, polyimides, or printing opacity insulating material such as polyamide, and preferably, the light transmittance of this body 311 can reach in more than 50%; Described micro-structural 312 can be the particulate that is scattered in this body 311, or is formed at fine structure in this body 311 via laser microscopic carvings mode.Utilize 312 pairs of incident lights 100 from extraneous incident of described micro-structural to reflect or reflect, destroy the light path of incident light, promote incident light 100 in the diffusion effect of this white light photic zone 31, and can effectively lower this incident light 100 in the mirror reflection of described W subpixel area.
Specifically, when described micro-structural 312 is when being made of the particulate that is scattered in this body 311, described particulate can be selected from particle diameter between printing opacity or the light-proof material of 0.1～1 μ m, preferably, for the light transmission that does not influence these white light photic zone 31 integral body also has preferable diffusion effect simultaneously, described particulate can be selected from acryl, poly-silica, or the particulate of light transmissive material formation such as an aforementioned wherein combination.In addition, when described micro-structural 312 is when utilizing laser microscopic carvings mode to be formed at this body 311, then can utilize the control of laser energy to make the part of this body 311 be transformed into different structure aspects, for example pyramid, semicircle arcuation, or have structural forms such as irregular surface, or the energy control that utilizes laser makes the partially crystallizable kenel of these body 311 constituent materials change, and obtains disperseing the micro-structural 312 in this body 311.Be to be constituted by acryl in micro-structural described in this preferred embodiment 312, and be selected from particle diameter between the particulate of 0.1～1 μ m.
In addition, what deserves to be mentioned is, when described micro-structural 312 is when being made of particulate, 31 of this white light photic zones can utilize and this red, green, blue filter layer 32,33,34 identical processing procedure modes, earlier will described particulate with cooperate lithographic process to make again after a photoresist is formed mixing.
This luminescence unit 4 can outwards send white light on correspondence arranges described first electrode 24 after accepting voltage.
This second electrode 5 is negative electrode, is formed at this luminescence unit 4 surfaces, is made of low workfunction metal such as magnesium, lithium, calcium, can cooperate with described first electrode 24 to apply voltages to this luminescence unit 4.
When applying bias voltage, this first and second electrode 24,5 certainly make electronics and hole inject this luminescence unit 4 from this second electrode 5 (negative electrode) and first electrode 24 (anode) respectively, white light can outwards be sent in electronics and hole after these luminescence unit 4 combinations, the white light that outwards sends then can cooperate white light photic zone 31, red filter layer 32, the green filter layer 33 by this filter unit 3, reach blue color filter layer 34 and adjust outwards send photochromic, and then produce Full-color OLED.
And be arranged on the diffusion unit of this each W subpixel area by described correspondence, can directly absorb the incident light 100 from extraneous incident, refraction or reflection, destroy the light path of incident light and can effectively lower this incident light 100 in the mirror reflection problem of described W subpixel area, and because described micro-structural 312 only correspondence be arranged on described W subpixel area, therefore can not look like known attaching optical diffusion film 16, increase this R and have, G, the shortcoming of B subpixel area scattered reflection not only can reach the mirror reflection that lowers the W sub-pixel and can avoid R simultaneously, G, the problem that the scattered reflection of B sub-pixel increases.
In addition, be noted that, when this OLED is the OLED structure of top emission type (Top emitted), then this filter unit 3 is for being arranged on this second electrode, 5 tops, 5 at this second electrode is for being selected from transparent conductive material, this first electrode 23 then changes into and is selected from the material with highly reflective, the light that this luminescence unit 4 sends then can pass through this second electrode 5, and this filter unit 3 outwards sends, also can be arranged on the diffusion unit of this each W subpixel area simultaneously by described correspondence, lower the mirror reflection problem of described W subpixel area, because the OLED structure of this top emission type (Top emitted) is that the art is known, therefore no longer add narration.
Utilization of the present invention arranges the diffusion unit that can absorb light and stray light path in described W sub-pixel correspondence, utilize the micro-structural 312 of this diffusion unit, directly the incident light 100 of incident reflects or reflects to external world, destroy the light path of incident light, not only can effectively lower this incident light 100 in the mirror reflection problem of this W sub-pixel, and because described micro-structural 312 only correspondence be arranged on described W sub-pixel, therefore can not look like known attaching optical diffusion film 16, this R of increasing is arranged, G, the shortcoming of B sub-pixel scattered reflection, not only can reach the problem that lowers mirror reflection and the shortcoming that can avoid scattered reflection to increase simultaneously, so the purpose of certain attainable cost invention.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (10)
1. an organic light-emitting display device comprises a plurality of pixels of arranging with array way, and each this pixel comprises a white sub-pixels and a plurality of color sub-pixel; It is characterized in that: this each white sub-pixels has a diffusion unit, and this diffusion unit has the body of an insulation and printing opacity, and a plurality of micro-structurals that are arranged on this body.
2. organic light-emitting display device as claimed in claim 1 is characterized in that: described micro-structural is to be formed in this body and particle diameter constitutes between the particulate of 0.1～1 μ m by being scattered in.
3. organic light-emitting display device as claimed in claim 2, it is characterized in that: described particulate is made of light transmissive material.
4. organic light-emitting display device as claimed in claim 3 is characterized in that: the constituent material of described particulate is selected from acryl, poly-silica, and an aforementioned wherein combination.
5. organic light-emitting display device as claimed in claim 4, it is characterized in that: described micro-structural is to utilize laser microscopic carvings mode to be formed at this body.
6. organic light-emitting display device as claimed in claim 5, it is characterized in that: described micro-structural is pyramid, or has irregular surface.
7. organic light-emitting display device as claimed in claim 5, it is characterized in that: described micro-structural is to utilize laser microscopic carvings mode to be formed at this body, and is identical with this body constituent material but have different crystalline forms.
8. organic light-emitting display device as claimed in claim 1, it is characterized in that: the constituent material of this body is selected from acrylic acid, polyimides, and polyamide.
9. organic light-emitting display device as claimed in claim 1, it is characterized in that: the light transmittance of this body reaches more than 50%.
10. organic light-emitting display device as claimed in claim 2, it is characterized in that: described particulate is made of light-proof material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210077801.9A CN103325809B (en) | 2012-03-22 | 2012-03-22 | Organic light-emitting display device |
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| CN201210077801.9A CN103325809B (en) | 2012-03-22 | 2012-03-22 | Organic light-emitting display device |
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| CN103325809A true CN103325809A (en) | 2013-09-25 |
| CN103325809B CN103325809B (en) | 2016-12-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109686869A (en) * | 2019-02-28 | 2019-04-26 | 武汉华星光电半导体显示技术有限公司 | A kind of OLED display panel and preparation method thereof |
| CN109690808A (en) * | 2018-12-05 | 2019-04-26 | 京东方科技集团股份有限公司 | Light emitting diode and its manufacturing method, display base plate and display panel |
| CN110603576A (en) * | 2017-05-12 | 2019-12-20 | 索尼公司 | Display device |
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| JP2010050014A (en) * | 2008-08-25 | 2010-03-04 | Seiko Epson Corp | Light-emitting device and electronic equipment |
| CN101711439A (en) * | 2007-05-31 | 2010-05-19 | 伊斯曼柯达公司 | Electroluminescent device having improved light output |
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| CN101711439A (en) * | 2007-05-31 | 2010-05-19 | 伊斯曼柯达公司 | Electroluminescent device having improved light output |
| US20090051284A1 (en) * | 2007-08-21 | 2009-02-26 | Cok Ronald S | Led device having improved light output |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110603576A (en) * | 2017-05-12 | 2019-12-20 | 索尼公司 | Display device |
| CN110603576B (en) * | 2017-05-12 | 2021-12-03 | 索尼公司 | Display device |
| US11222875B2 (en) | 2017-05-12 | 2022-01-11 | Sony Corporation | Display apparatus |
| CN109690808A (en) * | 2018-12-05 | 2019-04-26 | 京东方科技集团股份有限公司 | Light emitting diode and its manufacturing method, display base plate and display panel |
| US11315982B2 (en) | 2018-12-05 | 2022-04-26 | Boe Technology Group Co., Ltd. | Light emitting diode with a patterned scattering layer and fabrication method thereof, display substrate and display panel |
| CN109686869A (en) * | 2019-02-28 | 2019-04-26 | 武汉华星光电半导体显示技术有限公司 | A kind of OLED display panel and preparation method thereof |
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| CN103325809B (en) | 2016-12-14 |
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Address after: 518100 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Applicant after: Innolux Display Group Address before: 518100 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Applicant before: Chimei Optoelectronics Co., Ltd. |
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