CN207883696U - A kind of electroluminescence display panel and display device - Google Patents
A kind of electroluminescence display panel and display device Download PDFInfo
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- CN207883696U CN207883696U CN201820393233.6U CN201820393233U CN207883696U CN 207883696 U CN207883696 U CN 207883696U CN 201820393233 U CN201820393233 U CN 201820393233U CN 207883696 U CN207883696 U CN 207883696U
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- 238000005401 electroluminescence Methods 0.000 title abstract description 5
- 239000010406 cathode material Substances 0.000 abstract description 6
- 238000007740 vapor deposition Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 11
- 230000008020 evaporation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
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Abstract
The utility model discloses a kind of electroluminescence display panel and display devices; in the first thickness for retaining flatness layer first area corresponding with green emitting pixel; do not influence flatness layer for cathode material protective effect in the case of; by reducing the second thickness of flatness layer second area corresponding with blue emitting pixel, the colour cast problem at blue emitting pixel can be improved；And/or, by the third thickness for reducing flatness layer third corresponding with red emitting pixel R region, the colour cast problem at red emitting pixel can be improved, reach improves colour cast by the vapor deposition at red and/or blue emitting pixel and the flatness layer of green emitting pixel thickness difference alienation, so that light emitting pixel colour cast difference can meet customer requirement.
Description
Technical Field
The utility model relates to a show technical field, especially relate to an electroluminescent display panel and display device.
Background
The degree of color distortion at large angles is an important measure of the color rendering of a display panel. The color cast can not reach the standard, which is a defect existing in the current Organic Light-Emitting display panel (OLED) product. Among them, green color shift is preferable, and red and blue color shifts are inferior.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention provide an electroluminescent display panel and a display device, so as to improve the color shift problem of the conventional electroluminescent display panel.
Accordingly, an embodiment of the present invention provides an electroluminescent display panel, including: a plurality of light emitting pixels, and a planarization layer over cathodes of the light emitting pixels; wherein,
the light emitting pixel includes: red, blue and green light-emitting pixels;
the thickness of a first area of the flat layer corresponding to the green light-emitting pixel is a first thickness, the thickness of a second area of the flat layer corresponding to the blue light-emitting pixel is a second thickness, and the thickness of a third area of the flat layer corresponding to the red light-emitting pixel is a third thickness;
the first thickness is greater than the second thickness, and/or the first thickness is greater than the third thickness.
In one possible implementation, in the electroluminescent display panel provided in the embodiments of the present invention, the second thickness is equal to the third thickness.
In one possible implementation manner, in the electroluminescence display panel provided in the embodiments of the present invention, the first thickness is 64nm to 66 nm.
In one possible implementation manner, in the electroluminescence display panel provided in the embodiments of the present invention, a difference between the first thickness and the second thickness is 10nm to 12 nm.
In one possible implementation manner, in the embodiment of the present invention, in the above electroluminescent display panel, the third thickness is greater than the second thickness.
In one possible implementation manner, in the electroluminescence display panel provided in the embodiments of the present invention, a difference between the second thickness and the third thickness is 9nm to 11 nm.
In one possible implementation manner, in the above-mentioned electroluminescent display panel, a thickness of the planarization layer in other regions except for the first region, the second region and the third region is a fourth thickness, and the fourth thickness is equal to the first thickness.
In one possible implementation manner, in the above-mentioned electroluminescent display panel, a thickness of the planarization layer in other regions except for the first region, the second region and the third region is a fourth thickness, and the fourth thickness is equal to the second thickness and/or the third thickness.
In a possible implementation manner, in the electroluminescent display panel provided in the embodiments of the present invention, the first region and the light emitting region of the green light-emitting pixel coincide with each other; the second area and the light-emitting area of the blue light-emitting pixel are mutually overlapped; the third region and the light emitting region of the red light emitting pixel coincide with each other.
On the other hand, the embodiment of the utility model provides a still provides a display device, include the embodiment of the utility model provides an above-mentioned electroluminescent display panel.
The utility model discloses beneficial effect includes:
the embodiment of the utility model provides an electroluminescent display panel and display device, keep the first thickness of the first region that flat layer and green emitting pixel correspond, do not influence under the circumstances of flat layer to the guard action of cathode material, through reducing the second thickness of the second region that flat layer and blue emitting pixel correspond, can improve the color cast problem of blue emitting pixel department; and/or the problem of color cast at the red light-emitting pixel can be improved by reducing the third thickness of the third area of the flat layer corresponding to the red light-emitting pixel R, so that the color cast can be improved by evaporating the flat layer with the thickness difference with the green light-emitting pixel at the red and/or blue light-emitting pixel, and the color cast difference of the light-emitting pixel can meet the requirement of a client.
Drawings
FIG. 1 is a schematic diagram of color shift of a red light-emitting pixel of an electroluminescent display panel;
FIG. 2 is a schematic diagram of color shift of a green emitting pixel of an electroluminescent display panel;
FIG. 3 is a schematic diagram of color shift of a blue light-emitting pixel of an electroluminescent display panel;
fig. 4 is a schematic structural diagram of an electroluminescent display panel according to an embodiment of the present invention;
fig. 5 is a schematic view of another structure of an electroluminescent display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electroluminescent display panel according to an embodiment of the present invention;
fig. 7 is a schematic view of another structure of an electroluminescent display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the present invention.
It was found analytically that the thickness of the planarising layer (CPL) above the cathode in an electroluminescent display panel directly affects the color shift, i.e. the thicker the planarising layer the worse the color shift. The planarization layer has the functions of improving the luminous efficiency and protecting the cathode, and if the overall thickness of the planarization layer is simply reduced in order to reduce or eliminate the influence of the thickness of the planarization layer on the color shift, the luminous efficiency will be reduced and the cathode material will not be well protected.
Specifically, the influence of the thickness variation of the planarization layer on the color shift of the red, green, and blue light-emitting pixels is analyzed. As is apparent from fig. 2 and 3, the color shifts of the blue-emitting pixels and the green-emitting pixels become significantly larger from 55n to 63nm as the thickness of the planarization layer increases. Whereas at a viewing angle of 30 deg., as shown in fig. 1 and 3, the color shift of each of the red-emitting pixel and the blue-emitting pixel is greater than 0.03, while the color shift of the green-emitting pixel is smaller, as shown in fig. 2, less than 0.019, it can be seen that the color shift of the green-emitting pixel is much smaller than that of the red-emitting pixel and the blue-emitting pixel. Because the green light-emitting pixels have better color bias and the red light-emitting pixels and the blue light-emitting pixels have poorer color bias, the color bias can be improved by evaporating the flat layers with different thicknesses at the light-emitting pixels of the three colors, so that the color bias of the light-emitting pixels of the three colors can all meet the requirements of customers.
Based on this, the present invention provides an electroluminescent display panel, as shown in fig. 4 to 7, including: a plurality of light emitting pixels 1, and a planarization layer 2 over the cathode 10 of the light emitting pixels 1; wherein,
the light emitting pixel 1 includes: red light-emitting pixels R, blue light-emitting pixels B, and green light-emitting pixels G;
the thickness of the first region 2G of the flat layer 2 corresponding to the green emitting pixel G is a first thickness dg, the thickness of the second region 2B of the flat layer 2 corresponding to the blue emitting pixel B is a second thickness db, and the thickness of the third region 2R of the flat layer 2 corresponding to the red emitting pixel R is a third thickness dr;
the first thickness dg is greater than the second thickness db, and/or the first thickness dg is greater than the third thickness dr.
Specifically, fig. 4 and 5 show the case where the first thickness dg is greater than the second thickness db, and the first thickness dg is greater than the third thickness dr. Fig. 6 shows a case where the first thickness dg is greater than the second thickness db, and the first thickness dg is equal to the third thickness dr. Fig. 7 shows a case where the first thickness dg is equal to the second thickness db, and the first thickness dg is greater than the third thickness dr.
Specifically, in the embodiment of the present invention, in the above-mentioned electroluminescent display panel, under the condition that the first thickness dg of the first region 2G corresponding to the green emitting pixel G of the flat layer 2 is kept, and the protection effect of the flat layer 2 on the cathode material is not affected, by reducing the second thickness db of the second region 2B corresponding to the blue emitting pixel B of the flat layer 2, the color shift problem at the blue emitting pixel B can be improved; and/or, by reducing the third thickness dr of the third area 2R of the flat layer 2 corresponding to the red light-emitting pixel R, the problem of color shift at the red light-emitting pixel R can be improved, and the purpose of improving the color shift by evaporating the flat layer with the thickness different from that of the green light-emitting pixel at the red and/or blue light-emitting pixel is achieved, so that the color shift difference of the light-emitting pixels can meet the requirements of customers.
Alternatively, in the electroluminescent display panel provided in the embodiments of the present invention, as shown in fig. 4 and 5, the second thickness db may be equal to the third thickness dr.
Specifically, when the second thickness db is equal to the third thickness dr, and the second thickness db and the third thickness dr are both smaller than the first thickness dg, the problem of color shift of the red emitting pixel R and the blue emitting pixel B can be simultaneously improved.
Moreover, when the planarization layer 2 is manufactured, a high-precision Mask (FMM Mask) may be added. Specifically, after the first evaporation is performed using an Open Mask (Open Mask) to form the flat layer 2 having a uniform thickness, the FMM Mask may be used to perform a second evaporation in a region where the red and blue pixels R and B are blocked, so as to form the flat layer 2 having a relatively large thickness corresponding to the region other than the red and blue pixels R and B, as shown in fig. 4. Alternatively, specifically, after the first vapor deposition is performed using an Open Mask (Open Mask) to form the flat layer 2 having a uniform thickness, the second vapor deposition may be performed using an FMM Mask to expose only the region of the green emission pixel G, thereby forming the flat layer 2 having a relatively large thickness corresponding to the region of the green emission pixel G, as shown in fig. 5.
Alternatively, in an embodiment of the present invention providing the above electroluminescent display panel, the first thickness dg may be 64nm to 66 nm. I.e. the maximum thickness in the planarising layer 2, i.e. the first thickness dg, is in the range of 64nm to 66nm, the protective effect of the planarising layer 2 on the cathode material can be ensured.
Optionally, in the above electroluminescent display panel provided in an embodiment of the present invention, a difference between the first thickness dg and the second thickness db may be in a range of 10nm to 12nm, that is, the second thickness db is smaller than the first thickness dg by about 10nm to 12nm, and the second thickness db is about 52nm to 56 nm.
Alternatively, in the electroluminescent display panel provided in the embodiments of the present invention, as can be seen from comparing fig. 1 and fig. 3, as the thickness of the flat layer 2 increases, the color shift of the blue light-emitting pixel B changes more than that of the red light-emitting pixel R, i.e., the thickness of the flat layer 2 is reduced equally, and the effect of the blue light-emitting pixel B on improving the color shift difference is obviously due to the red light-emitting pixel R. Therefore, as shown in fig. 7, the third thickness dr may be set to be greater than the second thickness db, so that the thickness of the planarization layer 2 at the red emitting pixel R is greater, and the cathode can be protected more favorably. At this time, as shown in fig. 7, the third thickness dr may be equal to the first thickness dg, or the third thickness dr may be smaller than the first thickness dg, which is not limited herein.
Optionally, in the embodiment of the present invention, a difference between the second thickness db and the third thickness dr may be in a range of 9nm to 11nm, that is, the second thickness db is smaller than the third thickness dr by about 9nm to 11nm, and the second thickness db is about 61nm to 66 nm.
Alternatively, in the present embodiment providing the above-described electroluminescent display panel, as shown in fig. 4, the thickness of the planarization layer 2 in the other regions except for the first region 2g, the second region 2b, and the third region 2r is a fourth thickness d, and the fourth thickness d may be equal to the first thickness dg.
Specifically, after the first evaporation is performed using an Open Mask (Open Mask) to form the flat layer 2 having a uniform thickness, the FMM Mask may be used to perform the second evaporation in a region where the red and/or blue pixels R and B are blocked, so as to form the flat layer 2 having a relatively large thickness corresponding to a region other than the red and/or blue pixels R and B.
Alternatively, in the embodiment of the present invention providing the above-mentioned electroluminescent display panel, as shown in fig. 5, the thickness of the planarization layer 2 in the other regions except for the first region 2g, the second region 2b, and the third region 2r is a fourth thickness d, and the fourth thickness d may be equal to the second thickness db and/or the third thickness dr.
Specifically, after the first evaporation is performed by using an Open Mask (Open Mask) to form the flat layer 2 having a uniform thickness, the FMM Mask may be used to perform the second evaporation only in the region where the green emitting pixel G is exposed, so as to form the flat layer 2 having a thicker thickness corresponding to the region of the green emitting pixel G, and at this time, the fourth thickness d, the second thickness db, and the third thickness dr are equal to each other; alternatively, the FMM Mask may be used to expose only the green and red emitting pixel regions for the second evaporation to form the thicker flat layer 2 corresponding to the green and red emitting pixel regions, where the fourth thickness d is equal to the second thickness db; alternatively, the FMM Mask may be used to perform the second deposition on the regions where only the green and blue pixels G and B are exposed, thereby forming the flat layer 2 having a large thickness corresponding to the green and blue pixels G and B, and in this case, the fourth thickness d may be equal to the third thickness dr.
Alternatively, in the present embodiment, there is provided the above-mentioned electroluminescent display panel, as shown in fig. 4 to 7, the first region 2G and the light-emitting region of the green light-emitting pixel G may coincide with each other, or the first region 2G may be slightly larger than the light-emitting region of the green light-emitting pixel G; the second region 2B and the light-emitting region of the blue-light-emitting pixel B may coincide with each other, or the second region 2B may be slightly larger than the light-emitting region of the blue-light-emitting pixel B; the third region 2R and the light-emitting region of the red light-emitting pixel R may coincide with each other, or the third region 2R may be slightly larger than the light-emitting region of the red light-emitting pixel R, which is not limited herein.
Based on same utility model the design, the embodiment of the utility model provides a still provides a display device, include the embodiment of the utility model provides an above-mentioned electroluminescent display panel, this display device can be for: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The implementation of the display device can be seen in the above-mentioned embodiment of the electroluminescent display panel, and repeated descriptions are omitted.
The utility model provides an above-mentioned electroluminescent display panel and display device, under the first thickness of the first region that keeps the flat bed and correspond with green emitting pixel, do not influence the guard action's of flat bed to cathode material circumstances, through reducing the second thickness of the second region that the flat bed and blue emitting pixel correspond, can improve the color cast problem of blue emitting pixel department; and/or the problem of color cast at the red light-emitting pixel can be improved by reducing the third thickness of the third area of the flat layer corresponding to the red light-emitting pixel R, so that the color cast can be improved by evaporating the flat layer with the thickness difference with the green light-emitting pixel at the red and/or blue light-emitting pixel, and the color cast difference of the light-emitting pixel can meet the requirement of a client.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An electroluminescent display panel, comprising: a plurality of light emitting pixels, and a planarization layer over cathodes of the light emitting pixels; wherein,
the light emitting pixel includes: red, blue and green light-emitting pixels;
the thickness of a first area of the flat layer corresponding to the green light-emitting pixel is a first thickness, the thickness of a second area of the flat layer corresponding to the blue light-emitting pixel is a second thickness, and the thickness of a third area of the flat layer corresponding to the red light-emitting pixel is a third thickness;
the first thickness is greater than the second thickness, and/or the first thickness is greater than the third thickness.
2. The electroluminescent display panel of claim 1, wherein the second thickness is equal to the third thickness.
3. The electroluminescent display panel of claim 1, wherein the first thickness is from 64nm to 66 nm.
4. The electroluminescent display panel of claim 1, wherein the difference between the first thickness and the second thickness is 10nm to 12 nm.
5. The electroluminescent display panel of claim 1, wherein the third thickness is greater than the second thickness.
6. The electroluminescent display panel of claim 5, wherein the difference between the second thickness and the third thickness is 9nm to 11 nm.
7. The electroluminescent display panel of claim 1, wherein the thickness of the planarization layer in regions other than the first region, the second region, and the third region is a fourth thickness, the fourth thickness being equal to the first thickness.
8. The electroluminescent display panel of claim 1, wherein the thickness of the planarization layer in regions other than the first region, the second region, and the third region is a fourth thickness, the fourth thickness being equal to the second thickness and/or the third thickness.
9. The electroluminescent display panel of claim 1, wherein the first region and the light emitting region of the green light emitting pixel coincide with each other; the second area and the light-emitting area of the blue light-emitting pixel are mutually overlapped; the third region and the light emitting region of the red light emitting pixel coincide with each other.
10. A display device comprising an electroluminescent display panel according to any one of claims 1 to 9.
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| CN201820393233.6U CN207883696U (en) | 2018-03-22 | 2018-03-22 | A kind of electroluminescence display panel and display device |
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| CN201820393233.6U CN207883696U (en) | 2018-03-22 | 2018-03-22 | A kind of electroluminescence display panel and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155464A1 (en) * | 2019-01-30 | 2020-08-06 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method therefor, and electronic device |
| CN111697044A (en) * | 2020-06-30 | 2020-09-22 | 云谷（固安）科技有限公司 | Display panel, display device and packaging cover plate |
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2018
- 2018-03-22 CN CN201820393233.6U patent/CN207883696U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155464A1 (en) * | 2019-01-30 | 2020-08-06 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method therefor, and electronic device |
| CN111697044A (en) * | 2020-06-30 | 2020-09-22 | 云谷（固安）科技有限公司 | Display panel, display device and packaging cover plate |
| CN111697044B (en) * | 2020-06-30 | 2023-04-07 | 云谷（固安）科技有限公司 | Display panel, display device and packaging cover plate |
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