CN100364135C - Pixel structure of high light organic active display panel - Google Patents
Pixel structure of high light organic active display panel Download PDFInfo
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- CN100364135C CN100364135C CNB2003101136994A CN200310113699A CN100364135C CN 100364135 C CN100364135 C CN 100364135C CN B2003101136994 A CNB2003101136994 A CN B2003101136994A CN 200310113699 A CN200310113699 A CN 200310113699A CN 100364135 C CN100364135 C CN 100364135C
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- 239000000463 material Substances 0.000 claims abstract description 22
- 238000005401 electroluminescence Methods 0.000 claims description 14
- 239000011241 protective layer Substances 0.000 abstract 4
- 238000003491 array Methods 0.000 abstract 1
- 239000010409 thin film Substances 0.000 description 17
- 239000011521 glass Substances 0.000 description 13
- 230000004888 barrier function Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005395 radioluminescence Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
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Abstract
The present invention provides a pixel structure of an organic light emitting display panel of high brightness, which at least comprises a protective layer and a reflecting wall, wherein the protective layer is made on a base material, and is provided with an opening so as to accommodate organic LEDs, and the reflecting wall is made on the side wall of the opening in a surrounding mode so as to reduce the lateral light leakage of the organic LEDs. The present invention also provides an organic light emitting display panel which is provided with a plurality of organic LEDs distributed on the base material in arrays. The organic light emitting display panel at least comprises a protective layer and a reflecting wall, wherein the protective layer is made on the base material, and is provided with a plurality of openings so as to accommodate the organic LEDs, and the reflecting wall is made on the side walls of the openings in a surrounding mode.
Description
Technical field
The invention relates to a kind of dot structure of organic electroluminescence display panel, especially a kind of minimizing side direction light leak is to improve the dot structure of display efficiency.
Technical background
Organic light emitting display (Organic Electroluminescence Display, OLED, OrganicEL Display) claims Organic Light Emitting Diode (Organic Light Emitting Diode again, OLED) display, owing to have the characteristic of high brightness, fast, compact, full-color, the no subtense angle of screen reaction speed and low power consumption, therefore can replace conventional liquid crystal, and become the display unit that portable information product of new generation, mobile phone, personal digital assistant device and portable computer generally use.
The difference of organic light emitting display and LCD maximum is that organic light emitting display utilizes self luminous organic luminous layer, as the source of display lighting.Please refer to Fig. 1, show a known Organic Light Emitting Diode 1, comprise an anode electrode plate 10, a luminescent layer 20 and a cathode electrode plate 30.Wherein, luminescent layer 20 is to be sandwiched between two battery lead plates 10 and 30, forms a sandwich (sandwich) structure.Under forward voltage drove, anode electrode plate 10 injected electric hole (hole) to luminescent layer 20, and cathode electrode plate 30 injects electronics (electron) to luminescent layer 20.Electric hole of injecting and electronics make electronics fall back ground state (base state) by excitation state (excited state), and the form radiation (radiation) of excess energy with light wave are disengaged in luminescent layer 20 combination of meeting.
Please refer to Fig. 2 A and Fig. 2 B, show the dot structure 40 of a typical case (active) organic light emitting display, Fig. 2 A is the vertical view of this dot structure 40, and Fig. 2 B is the sectional view corresponding to a-a hatching among Fig. 2 A.This dot structure 40 comprises a glass baseplate 100, a bottom electrode 120, a sheath 130, an organic luminous layer 140 and a top electrode 150.The upper surface of glass baseplate 100 is manufactured with the barrier layer 110 that a thin-film transistor 200 and covers this thin-film transistor 200 in regular turn.Bottom electrode 120 is to be made on this barrier layer 110, and is connected to thin-film transistor 200.Sheath 130 is to be made on the glass baseplate 100, covers above-mentioned thin-film transistor 200 and bottom electrode 120, and has an opening 132 with exposed portion bottom electrode 120, uses the position of luminous zone in this dot structure 40 of definition.Organic luminous layer 140 is the upper surfaces that are made in bottom electrode 120, extend on the sheath 130, and top electrode 150 is the upper surfaces that are made in this organic luminous layer 140.
When a drive current above-mentioned organic luminous layer 140 of flowing through, shown in Fig. 2 B, in this organic luminous layer, the direction of radioluminescence and not only be confined to luminous or luminous toward the direction of glass baseplate 100 toward the direction of top electrode 150, but toward scattering from all directions.Therefore, toward the light of side direction scattering, can't be applied to demonstration, and cause the energy dissipation of this organic light emitting display.
In addition, please refer to Fig. 3, in order to reach the purpose of full-color demonstration, on organic electroluminescence display panel, redgreenblue dot structure 40a, 40b, 40c are adjacent one another are, and the ratio by adjusting three colour brightnesses mixes different Show Colors.Yet, because in the dot structure 40, organic luminous layer 140 is not interrupted toward the light of side direction scattering, directly enter the dot structure 40 of adjacent different colours, and influence adjacent redgreenblue dot structure 40a, 40b, 40c, the proportionate relationship of its luminosity, and cause display color to depart from expection, cause the distortion and the error of picture.
In view of this, the present invention proposes a kind of dot structure 40 that prevents organic luminous layer 140 side direction light leaks, can improve the efficient of demonstration first, can improve the influence of above-mentioned side direction light leak to the full-color demonstration of organic light emitting display first.
Summary of the invention
The purpose of this invention is to provide a kind of dot structure, to improve the display efficiency of Organic Light Emitting Diode in the dot structure.
Another object of the present invention is distortion and an error of avoiding phase display color that mutual interference causes between adjacent Organic Light Emitting Diode.
Organic electroluminescence display panel dot structure of the present invention comprises a sheath and a reflecting wall at least.Sheath is to be made on the base material, has an opening accommodating OLED, and reflecting wall is a sidewall of making and be surrounded on above-mentioned opening, to reduce the side direction light leak of Organic Light Emitting Diode.
A kind of dot structure of organic electroluminescence display panel, it comprises at least:
One sheath is to be made on the base material, and has an opening, and to accommodate OLED, this Organic Light Emitting Diode comprises:
One bottom electrode is a transparency electrode, is made on the described base material, and inserts in the described opening;
One organic luminous layer is made on described sheath and the described bottom electrode; And
One top electrode is a metallic reflection electrode, is made in the upper surface of described organic luminous layer, uses to make the direction of the described base material of this organic light emission course luminous; And
One reflecting wall is making and be surrounded on this opening sidewalls, to reduce the luminous side direction light leak of this Organic Light Emitting Diode.
Described bottom electrode is the upper surface that is extended to this sheath by this opening.
Described bottom electrode be clamping between this base material and this sheath, and, see through this opening and be connected to this organic luminous layer.
Described opening is a rectangular aperture.
A kind of organic electroluminescence display panel has a plurality of Organic Light Emitting Diodes, and array is distributed on the base material, and this organic electroluminescence display panel comprises at least:
One sheath is to be made on this base material, and has a plurality of openings, and to hold these Organic Light Emitting Diodes, this Organic Light Emitting Diode comprises:
One bottom electrode is a transparency electrode, is made on the described base material, and inserts in the described opening;
One organic luminous layer is made on described sheath and the described bottom electrode; And
One top electrode is a metallic reflection electrode, is made in the upper surface of this organic luminous layer, uses to make the direction of the described base material of described organic light emission course luminous; And
One reflecting wall is a sidewall of making and be surrounded on these openings.
Described organic electroluminescence display panel, wherein each bottom electrode is the upper surface that is extended to this sheath respectively by this corresponding opening bottom surface.
Described organic electroluminescence display panel, wherein each bottom electrode be clamping between this base material and this sheath, and, see through this corresponding opening and be connected to this organic luminous layer.
Therefore, adopt dot structure of the present invention, not only can improve the efficient of demonstration, can also improve of the influence of side direction light leak the full-color demonstration of organic light emitting display.
Description of drawings
Fig. 1 is the schematic diagram of a typical Organic Light Emitting Diode.
Fig. 2 A and Fig. 2 B are the schematic diagrames of a typical organic light emitting display dot structure.
Fig. 3 is a typical full-color display floater, the schematic diagram of the luminous phase mutual interference of redgreenblue pixel.
Fig. 4 A and Fig. 4 B are the schematic diagrames of organic light emitting display dot structure first embodiment of the present invention.
Fig. 5 is the schematic diagram of second embodiment of organic light emitting display dot structure of the present invention.
Fig. 6 is the schematic diagram of the 3rd embodiment of organic light emitting display dot structure of the present invention.
The figure number explanation:
| Organic |
Anode electrode plate 10 |
| |
|
| |
Glass baseplate 100,300 |
| Barrier layer 110,310 | Bottom electrode 120,320,322,324 |
| Sheath 130,330 | Organic luminous layer 140,340 |
| Top electrode 150,350 | Thin-film transistor 200,400 |
| Transparent |
Reflector 360,370 |
| Reflecting wall 361 | Reflector |
| Reflector |
Embodiment
Please refer to Fig. 4 A and Fig. 4 B, show first embodiment of organic light emitting display dot structure of the present invention.Fig. 4 A is the vertical view of this dot structure, and Fig. 4 B is the sectional view corresponding to b-b hatching among Fig. 4 A.This dot structure comprises a glass baseplate 300, one transparent bottom electrode 320, a sheath 330, a reflecting wall 361, an organic luminous layer 340 and an electrode of metal 350.The upper surface of glass baseplate 300 is manufactured with the barrier layer 310 that a thin-film transistor 400 and covers this thin-film transistor 400 in regular turn.Transparent bottom electrode 320 is to make on this barrier layer 310, and is connected to thin-film transistor 400.Sheath 330 is to be made on this glass baseplate 300, covers above-mentioned thin-film transistor 400 and part bottom electrode 320, and has an opening 332 with exposed portion bottom electrode 320, uses the position of light-emitting diode in this dot structure of definition.Reflecting wall 361 is the sidewall surfaces that are made in this sheath opening 332, and organic luminous layer 340 is the upper surfaces that are made in bottom electrode 320, reflecting wall 361 and sheath 330, and simultaneously, electrode of metal 350 is the upper surfaces that are made in this organic luminous layer 340.By this, organic luminous layer 340 luminous, via the reflection of above-mentioned reflecting wall 361 and electrode of metal 350 with concentrate, can guarantee the directional divergence of light toward below glass baseplate 300, avoid producing the side direction light leak simultaneously.
Please refer to Fig. 5, show second embodiment of organic light emitting display dot structure of the present invention.This dot structure comprises a glass baseplate 300, a bottom electrode 322, a sheath 330, a reflector 360, an organic luminous layer 340 and a transparent upper electrode 352.The upper surface of glass baseplate 300 is manufactured with the barrier layer 310 that a thin-film transistor 400 and covers this thin-film transistor 400 in regular turn.Sheath 330 is to be made on this barrier layer 310, and has an opening 332 to define the position of light-emitting diode in this dot structure.Reflector 360 is to be made in this opening 332, can divide into the lateral parts 360b that a bottom surface portions 360a and who is made in these opening 332 bottoms is made in this opening sidewalls.Bottom electrode 322 is the upper surfaces that are made in above-mentioned bottom surface portions 360a, and extension is connected to thin-film transistor 400.Organic luminous layer 340 is the upper surfaces that are made in bottom electrode 322 and sheath 330, and simultaneously, transparent upper electrode 352 is the upper surfaces that are made in this organic luminous layer 340.By the reflecting effect of said reflection plate 362 with reflection clearance wall 364, can produce the effect of a similar optically focused, guarantee the luminous directional divergence of organic luminous layer 340 toward top electrode 352, avoid producing the side direction light leak simultaneously.
Please refer to Fig. 6, show the 3rd embodiment of organic light emitting display dot structure of the present invention.This dot structure comprises a glass baseplate 300, a bottom electrode 324, a sheath 330, a reflector 370, an organic luminous layer 340 and a transparent upper electrode 352.The upper surface of glass baseplate 300 is manufactured with the barrier layer 310 that a thin-film transistor 400 and covers this thin-film transistor 400 in regular turn.U type reflector 370 is to be made on this barrier layer 310, and extends to above-mentioned thin-film transistor 400 tops.A bottom surface portions 370a and a lateral parts 370b who extends to thin-film transistor 400 tops can be divided in this reflector 370.Bottom electrode 324 is the upper surfaces that are made in above-mentioned bottom surface portions 370a, and extends the above-mentioned thin-film transistor 400 of connection.Sheath 330 is to be made on barrier layer 310 and the bottom electrode 324, and has the above-mentioned bottom electrode 324 of an opening 332 exposed portion, uses the position of light-emitting diode in this dot structure of definition.Organic luminous layer 340 is the bottom surfaces that are made in this opening 332, and extends covering sheath 330, and simultaneously, transparent upper electrode 352 is the upper surfaces that are made in this organic luminous layer 340.By the reflection in above-mentioned U-shaped reflector 370, can produce the effect of a similar optically focused, guarantee the luminous directional divergence of organic luminous layer 340 toward top electrode 352, avoid producing the side direction light leak simultaneously.
Compared to traditional organic light emitting display, dot structure of the present invention has following advantage:
One, auxiliary by reflecting wall 361 or reflector lateral parts 360a or 370a can be assembled the luminous of Organic Light Emitting Diode, avoids light to scatter and disappear toward side direction simultaneously, uses the efficient that improves luminous demonstration.
Two, auxiliary by reflecting wall 361 or reflector lateral parts 360a or 370a can avoid luminous the overflowing of pixel to be dissipated to neighborhood pixels, and cause the deviation of pixel display color.Rgb pixels structure with regard to full-color demonstration describes, when luminous overflow of red pixel is dissipated to adjacent green pixel, will sneaks in green pixel luminous, thereby cause extraneous finding, the luminous yellow (with regard to addition colour mixture, redness adds green and presents yellow) that has of green pixel.
The above is to utilize preferred embodiment to describe the present invention in detail, but not limit the scope of the invention, and know this type of skill personage and all can understand, suitably do slightly change and adjustment, will not lose main idea of the present invention place, also not break away from the spirit and scope of the present invention.
Claims (7)
1. the dot structure of an organic electroluminescence display panel is characterized in that comprising at least:
One sheath is to be made on the base material, and has an opening, and to accommodate OLED, this Organic Light Emitting Diode comprises:
One bottom electrode is a transparency electrode, is made on the described base material, and inserts in the described opening;
One organic luminous layer is made on described sheath and the described bottom electrode; And
One top electrode is a metallic reflection electrode, is made in the upper surface of described organic luminous layer, mat
So that the direction of the described base material of this organic light emission course is luminous; And
One reflecting wall is making and be surrounded on this opening sidewalls, to reduce the luminous side direction light leak of this Organic Light Emitting Diode.
2. dot structure as claimed in claim 1 is characterized in that: this bottom electrode is the upper surface that is extended to this sheath by this opening.
3. dot structure as claimed in claim 1 is characterized in that: this bottom electrode be clamping between this base material and this sheath, and, see through this opening and be connected to this organic luminous layer.
4. dot structure as claimed in claim 1 is characterized in that: this opening is a rectangular aperture.
5. an organic electroluminescence display panel has a plurality of Organic Light Emitting Diodes, and array is distributed on the base material, it is characterized in that this organic electroluminescence display panel comprises at least:
One sheath is to be made on this base material, and has a plurality of openings, and to hold these Organic Light Emitting Diodes, this Organic Light Emitting Diode comprises:
One bottom electrode is a transparency electrode, is made on the described base material, and inserts in the described opening;
One organic luminous layer is made on described sheath and the described bottom electrode; And
One top electrode is a metallic reflection electrode, is made in the upper surface of this organic luminous layer, uses to make the direction of the described base material of described organic light emission course luminous; And a reflecting wall, be the sidewall of making and be surrounded on these openings.
6. organic electroluminescence display panel as claimed in claim 5 is characterized in that: each bottom electrode is the upper surface that is extended to this sheath respectively by this corresponding opening bottom surface.
7. organic electroluminescence display panel as claimed in claim 5 is characterized in that: each bottom electrode be clamping between this base material and this sheath, and, see through this corresponding opening and be connected to this organic luminous layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101136994A CN100364135C (en) | 2003-11-19 | 2003-11-19 | Pixel structure of high light organic active display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101136994A CN100364135C (en) | 2003-11-19 | 2003-11-19 | Pixel structure of high light organic active display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1545371A CN1545371A (en) | 2004-11-10 |
| CN100364135C true CN100364135C (en) | 2008-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003101136994A Expired - Lifetime CN100364135C (en) | 2003-11-19 | 2003-11-19 | Pixel structure of high light organic active display panel |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4534054B2 (en) * | 2004-06-25 | 2010-09-01 | 京セラ株式会社 | Organic EL display panel and its manufacturing method |
| WO2013190661A1 (en) * | 2012-06-20 | 2013-12-27 | パイオニア株式会社 | Organic electroluminescence device |
| CN105552249B (en) * | 2016-03-16 | 2017-11-14 | 京东方科技集团股份有限公司 | Oled display substrate and preparation method thereof, display device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5834893A (en) * | 1996-12-23 | 1998-11-10 | The Trustees Of Princeton University | High efficiency organic light emitting devices with light directing structures |
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2003
- 2003-11-19 CN CNB2003101136994A patent/CN100364135C/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5834893A (en) * | 1996-12-23 | 1998-11-10 | The Trustees Of Princeton University | High efficiency organic light emitting devices with light directing structures |
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| CN1545371A (en) | 2004-11-10 |
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