CN109950271B - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- CN109950271B CN109950271B CN201711382770.7A CN201711382770A CN109950271B CN 109950271 B CN109950271 B CN 109950271B CN 201711382770 A CN201711382770 A CN 201711382770A CN 109950271 B CN109950271 B CN 109950271B
- Authority
- CN
- China
- Prior art keywords
- emitting unit
- light
- light emitting
- layer
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The present invention provides a display, comprising: a substrate; the light emitting units are positioned on one side of the substrate and comprise a first color light emitting unit, a second color light emitting unit and a third color light emitting unit, the light emitting wavelength of the first color light emitting unit is greater than that of the second color light emitting unit, and the light emitting wavelength of the second color light emitting unit is greater than that of the third color light emitting unit; the first color light-emitting unit is an inorganic light-emitting unit and comprises a quantum point light source and a quantum point film, and the quantum point light source is positioned between the substrate and the quantum point film; the second color light-emitting unit and the third color light-emitting unit are organic light-emitting units. The invention provides a display to reduce or even eliminate color cast of a visual angle.
Description
Technical Field
The embodiment of the invention relates to a display technology, in particular to a display.
Background
With the development of flat panel display technology, Organic Light Emitting Diode (OLED) display panels have become the mainstream of new generation flat panel display devices due to their characteristics of fast response, wide color gamut, ultra-thin, self-luminescence, flexibility, etc., compared with conventional liquid crystal display panels.
In the prior art, in order to realize full color of an OLED display panel, one mode is to add a white organic light emitting diode and a color filter layer, and since the color filter layer filters light by absorption, the light utilization efficiency is low; another way to realize full-color OLED display panels is to generate three primary colors of red, green, and blue by using organic light emitting diodes with different emission colors, and then to realize color display by mixing the three primary colors of red, green, and blue.
However, the OLED display panels in the prior art all have a problem of color shift of viewing angle, which means that chromaticity changes correspondingly with the change of viewing angle, and the problem of color shift of viewing angle is especially serious for a long-wavelength light emitting unit, and the problem needs to be solved.
Disclosure of Invention
The embodiment of the invention provides a display to reduce or even eliminate color cast of a visual angle.
An embodiment of the present invention provides a display, including:
a substrate;
the light emitting units are positioned on one side of the substrate and comprise a first color light emitting unit, a second color light emitting unit and a third color light emitting unit, the light emitting wavelength of the first color light emitting unit is greater than that of the second color light emitting unit, and the light emitting wavelength of the second color light emitting unit is greater than that of the third color light emitting unit;
the first color light-emitting unit is an inorganic light-emitting unit and comprises a quantum point light source and a quantum point film, and the quantum point light source is positioned between the substrate and the quantum point film; the second color light-emitting unit and the third color light-emitting unit are organic light-emitting units.
Optionally, the first color light emitting unit is a red light emitting unit, the second color light emitting unit is a green light emitting unit, and the third color light emitting unit is a blue light emitting unit.
Optionally, the quantum dot light source comprises a light emitting diode.
Optionally, the light emitting diode is a blue light source, a violet light source or a white light source.
Optionally, the display further comprises a driving circuit layer and a pixel defining layer, the driving circuit layer being located between the substrate and the pixel defining layer;
the pixel defining layer includes a plurality of openings, and each of the light emitting units is located in one of the openings.
Optionally, the display further includes a cover plate opposite to the substrate, and the quantum dot film is formed on a side of the cover plate close to the substrate.
Optionally, the display further comprises a thin film encapsulation layer located between the quantum dot film and the quantum dot light source.
Optionally, the display further includes a buffer protection layer, and the buffer protection layer is located on a side of the quantum dot film away from the substrate.
Optionally, the organic light emitting unit comprises a first electrode, an organic light emitting structure and a second electrode in a direction away from the substrate;
the organic light-emitting structure comprises a light-emitting material layer and an auxiliary light-emitting layer, wherein the auxiliary light-emitting layer comprises at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, an electron injection layer and a hole blocking layer.
Optionally, the quantum dot film covers the quantum dot light source.
The embodiment of the invention provides a display, which comprises a first color light-emitting unit, a second color light-emitting unit and a third color light-emitting unit, wherein the light-emitting wavelength of the first color light-emitting unit is longest, the light-emitting wavelength of the second color light-emitting unit is shorter, and the light-emitting wavelength of the third color light-emitting unit is shortest. In general, an OLED display panel includes a microcavity structure formed by a reflective film and a transflective film, and color shift of a viewing angle is more serious for a light emitting unit having a longer wavelength due to the microcavity structure. In the embodiment of the invention, the first color light-emitting unit is replaced by the inorganic light-emitting unit, the inorganic light-emitting unit specifically adopts a mode that the quantum dot light source irradiates the quantum dot film, the quantum dot film comprises a plurality of quantum dots, the illumination emitted by the quantum dot light source is absorbed by the quantum dots on the quantum dot film and emits the light of the first color, and the light-emitting wavelength of the quantum dots is only related to the properties (such as materials, particle sizes and the like) of the quantum dots and is unrelated to the observed visual angle, so that the color cast of the visual angle is reduced or even eliminated.
Drawings
Fig. 1 is a schematic top view of a display according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view along AA' in FIG. 1;
fig. 3 is a schematic structural diagram of an organic light emitting structure according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of another display according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional structure diagram of another display according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic top view of a display according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view along AA' in fig. 1, which is combined with fig. 1 and fig. 2, the display includes a substrate 10 and a plurality of light emitting units 20 located on one side of the substrate 10. The plurality of light emitting units 20 may include light emitting units 20 of a plurality of emission colors, and illustratively, the plurality of light emitting units 20 include first color light emitting units 21, second color light emitting units 22, and third color light emitting units 23, the first color light emitting units 21 having an emission wavelength longer than that of the second color light emitting units 22, and the second color light emitting units 22 having an emission wavelength longer than that of the third color light emitting units 23. The first color light emitting unit 21 is an inorganic light emitting unit, which refers to a light emitting unit in which a light emitting material is an inorganic material, and the first color light emitting unit 21 includes a quantum dot light source 211 and a quantum dot film 212, and the quantum dot light source 211 is located between the substrate 10 and the quantum dot film 212. The second color light emitting unit 22 and the third color light emitting unit 23 are organic light emitting units, and the organic light emitting unit refers to a light emitting unit in which a light emitting material is an organic material.
The embodiment of the invention provides a display, which comprises a first color light-emitting unit, a second color light-emitting unit and a third color light-emitting unit, wherein the light-emitting wavelength of the first color light-emitting unit is longest, the light-emitting wavelength of the second color light-emitting unit is shorter, and the light-emitting wavelength of the third color light-emitting unit is shortest. In general, an OLED display panel includes a microcavity structure formed by a reflective film and a transflective film, and color shift of a viewing angle is more serious for a light emitting unit having a longer wavelength due to the microcavity structure. According to the embodiment of the invention, the first color light-emitting unit is replaced by the inorganic light-emitting unit, the inorganic light-emitting unit specifically adopts a mode that a quantum dot light source irradiates a quantum dot film, the quantum dot film comprises a plurality of quantum dots, the quantum dots are usually made of IIB-VIA or IIIA-VA group element materials in the periodic table of elements, and as electrons and holes are quantum confined, a continuous energy band structure is changed into a discrete energy level structure with molecular characteristics, and the quantum dots can emit fluorescence after being excited. The light emitted by the quantum point light source passes through the quantum dots on the quantum dot film and then is emitted out in the first color, and the light-emitting wavelength is only related to the properties (such as materials, particle size and the like) of the quantum dots and is unrelated to the observed visual angle, so that the color cast of the visual angle can be eliminated. Taking the display capable of emitting red, green and blue light as an example, the embodiment of the invention can eliminate color cast of a red viewing angle. In addition, it should be noted that, in the embodiment of the present invention, only the quantum dot light source and the quantum dot film are used for the first color light emitting unit with the longest emission wavelength, and the second color light emitting unit and the third color light emitting unit still adopt the organic light emitting unit, which is not only related to the factor of "the color shift is more serious at a longer wavelength and the following factors are considered at the same time: the shorter the light-emitting wavelength of the quantum dot is, the shorter the light-emitting wavelength of the required excitation light source (quantum dot light source) is, and the shorter the wavelength of the light is, the damage to other parts of the display (such as a driving circuit) is caused, and the short wavelength of the light is emitted out of the display, which is harmful to human health. The production equipment of the quantum dot film is not perfect enough, and the production cost is high. Therefore, the technical scheme provided by the embodiment of the invention simultaneously considers the factors of visual angle color cast, compatibility with other devices in the display, production cost and the like.
Alternatively, referring to fig. 1 and 2, the first color light emitting unit 21 is a red light emitting unit, and the light emission color of the red light emitting unit is red (R); the second color light emitting unit 22 is a green light emitting unit, and the light emitting color of the green light emitting unit is green (G); the third color light emitting unit 23 is a blue light emitting unit, and the light emission color of the blue light emitting unit is blue (B). Pleochromization of the display can be achieved by mixing the three primary colors of red, green and blue. It should be noted that, in addition to using RGB (red, green and blue) to realize full color of the display, RGBW (red, blue and white) may be used to realize full color of the display, and for the display using RGBW (red, blue and white) to realize full color, the red light emitting unit therein may be replaced by an inorganic light emitting unit composed of the quantum dot light source 211 and the quantum dot film 212, so as to reduce or even eliminate the viewing angle color cast thereof. For the display of the RGB mode or the RGBW mode, the color purity of red is improved while the color cast of a red viewing angle is reduced or even eliminated, so that the color gamut of the display is enlarged.
Alternatively, referring to fig. 2, the quantum dot light source 211 includes a light emitting diode, abbreviated As LED, which may be made of a compound of gallium (Ga) and arsenic (As), phosphorus (P), nitrogen (N), indium (In). When a forward voltage is applied to the light emitting diode, holes injected from the P region to the N region and electrons injected from the N region to the P region recombine with the electrons in the N region and the holes in the P region within a few micrometers near the PN junction, respectively, and spontaneous emission fluorescence is generated.
Alternatively, referring to fig. 2, the light emitting diode is a blue light source, a violet light source, or a white light source. On one hand, the white light source has a wide light-emitting spectrum, the blue light source and the purple light source have narrow light-emitting spectra, and the excessively wide light-emitting spectra can cause that a part of light energy in the light-emitting spectra cannot be absorbed by quantum dots, so that the light energy utilization rate is low; on the other hand, the emission wavelength of the violet light source is smaller than that of the blue light source, for example, an ultraviolet LED can be used as the violet light source, the ultraviolet wavelength generated by the ultraviolet LED is short, and may damage other components (such as a driving circuit) of the display, and meanwhile, if the ultraviolet light generated by the ultraviolet LED cannot be completely absorbed by the quantum dots, a part of the ultraviolet light may be emitted out of the display through the quantum dot film 212, which may harm human health. Therefore, a blue light source is a preferred light source to excite the quantum dots to emit light.
Alternatively, referring to fig. 1 and 2, the display may further include a driving circuit layer 30 and a pixel defining layer 40, the driving circuit layer 30 is located between the substrate 10 and the pixel defining layer 40, the pixel defining layer 40 may include a plurality of openings 41, and each of the light emitting units 20 (including the first color light emitting unit 21, the second color light emitting unit 22, and the third color light emitting unit 23) is located in one of the openings 41. The driving circuit layer 30 may include a plurality of driving transistors (not shown in fig. 2), each of which is electrically connected to one of the light emitting units 20, and the driving transistors may be turned on or off to control whether the light emitting unit 20 electrically connected thereto emits light or not, and the driving transistors may be controlled to emit light according to the magnitude of the driving current/driving voltage to control the light emitting unit 20 electrically connected thereto. The pixel defining layer 40 is generally made of an organic material, and serves to define the light emitting cells 20 and prevent crosstalk of light between adjacent light emitting cells 20. In the embodiment of the present invention, in order to minimize the modification of the conventional OLED display panel manufacturing process, so as to save the process and the production cost, the inorganic light emitting unit may be formed in the opening of the pixel defining layer. The manner of forming the inorganic light emitting unit in the opening of the pixel defining layer may be, for example, by means of transfer.
Alternatively, referring to fig. 2, the quantum dot film 212 covers the quantum dot light source 211, so that light emitted from the quantum dot light source 211 can be irradiated onto the quantum dot film 212, on one hand, the light utilization efficiency of the quantum dot light source 211 is ensured, on the other hand, the light emitted from the quantum dot light source 211 is prevented from directly exiting to the outside of the display without being absorbed by quantum dots in the quantum dot film 212, and the light emitted from the quantum dot light source 211 directly exits to the outside of the display without being absorbed by quantum dots in the quantum dot film 212, so that the display is subjected to color shift. In the embodiment of the invention, the quantum dot light source 211 is covered by the quantum dot film 212, so that the adverse effect is avoided.
Fig. 3 is a schematic structural diagram of an organic light emitting structure according to an embodiment of the present invention, and referring to fig. 2 and 3, the organic light emitting units (the second color light emitting unit 22 and the third color light emitting unit 23) include a first electrode 201, an organic light emitting structure 203, and a second electrode 202 in a direction away from the substrate 10. The first electrode 201 may be a cathode/anode, the second electrode 202 may be an anode/cathode, optionally, the second electrode 202 is a light-emitting side electrode of the display, and the second electrode 202 may be made of Indium Tin Oxide (ITO) or the like, for example. The organic light emitting structure 203 may include a light emitting material layer 2033 and an auxiliary light emitting layer including an electron injection layer 2031, an electron transport layer 2032, a hole transport layer 2034, and a hole injection layer 2035, holes are injected from an anode into the light emitting material layer 2033 through the hole injection layer 2035 and the hole transport layer 2034, electrons are injected from a cathode into the light emitting material layer 2033 through the electron injection layer 2031 and the electron transport layer 2032, the holes and the electrons are recombined in the light emitting material layer 2033 to form excitons, and photons are generated when the excitons transition from an excited state to a ground state, thereby forming light. It should be noted that the organic light emitting structure shown in fig. 3 is only an example, the invention is not limited thereto, and the auxiliary light emitting layer may include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, an electron injection layer, and a hole blocking layer.
Fig. 4 is a schematic cross-sectional structure view of another display according to an embodiment of the present invention, and different from fig. 2, the second electrode 202 in fig. 4 does not cover the first light-emitting color unit 21, so the second electrode 202 does not weaken the intensity of the emitted light of the first light-emitting color unit 21, and compared with the display shown in fig. 2, the display according to the embodiment of the present invention has a higher light-emitting luminance at the first light-emitting color unit 21.
Alternatively, referring to fig. 2 and 4, the display further includes a cover plate 50 opposite to the substrate 10, and the quantum dot film 212 is formed on a side of the cover plate 50 adjacent to the substrate 10. For example, the quantum dot film 212 may be formed on the cover plate 50 by spraying or printing, and then the side of the cover plate 50 on which the quantum dot film 212 is formed may be aligned with and bonded to the side of the substrate 10 on which the quantum dot light source 211 is formed. The display may further include a frame sealing adhesive (not shown in fig. 2 and 4), and the substrate 10 and the cover plate 50 may be pressed together by the frame sealing adhesive, thereby forming the display.
Fig. 5 is a schematic cross-sectional structure diagram of another display according to an embodiment of the present invention, and different from fig. 4, the display shown in fig. 5 is packaged in a flexible manner, and if the substrate 10 is a flexible substrate (for example, the substrate 10 may be made of polyimide), the display may implement flexible display, as shown in fig. 5, the display further includes a thin film encapsulation layer 60, and the thin film encapsulation layer 60 is located between the quantum dot film 212 and the quantum dot light source 211. The thin film encapsulation layer 60 may include an inorganic insulating layer, an organic insulating layer, or a stacked structure of an organic insulating layer and an inorganic insulating layer. It should be noted that, in other embodiments, the quantum dot film 212 may also be located between the quantum dot light source 211 and the thin film encapsulation layer 60, and the specific situation may be set according to the actual product requirement, and the invention does not limit whether there are other film layers between the quantum dot film 212 and the quantum dot light source 211, as long as the quantum dot film 212 is located on the side of the quantum dot light source 211 away from the substrate 10. In addition, in other embodiments, the second electrode 202 of the display shown in fig. 5 may be disposed to cover the quantum dot light source 211, and an insulating layer may be disposed between the second electrode 202 and the quantum dot light source 211 in order to electrically insulate the second electrode 202 from the quantum dot light source 211. In the embodiment of the present invention, the thin film encapsulation layer 70 is disposed between the quantum dot film 212 and the quantum dot light source 211, so that the process can be simplified, and when the flexible display is bent, the quantum dot light source 211 and the quantum dot film 212 are separated by the thin film encapsulation layer 60, thereby preventing the direct contact between the quantum dot light source 211 and the quantum dot film 212 and preventing the quantum dot film 212 from being mechanically damaged.
Further, referring to fig. 5, in order to protect the quantum dot film 212 from external mechanical damage, a buffer protection layer 70 may be further covered on a side of the quantum dot film 212 away from the substrate 10, the buffer protection layer 70 completely covers the quantum dot film 212 and extends to cover the thin film encapsulation layer 60, and the buffer protection layer 70 simultaneously protects the thin film encapsulation layer 60 from external mechanical damage, so as to ensure the water and oxygen blocking capability of the thin film encapsulation layer 60, thereby enabling the display to work normally.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A display, comprising:
a substrate;
the light emitting units are positioned on one side of the substrate and comprise a first color light emitting unit, a second color light emitting unit and a third color light emitting unit, the light emitting wavelength of the first color light emitting unit is greater than that of the second color light emitting unit, and the light emitting wavelength of the second color light emitting unit is greater than that of the third color light emitting unit;
the first color light-emitting unit is an inorganic light-emitting unit and comprises a quantum point light source and a quantum point film, and the quantum point light source is positioned between the substrate and the quantum point film; the second color light-emitting unit and the third color light-emitting unit are organic light-emitting units;
the display also includes a thin film encapsulation layer positioned between the quantum dot film and the quantum dot light source.
2. The display according to claim 1, wherein the first color light-emitting unit is a red light-emitting unit, the second color light-emitting unit is a green light-emitting unit, and the third color light-emitting unit is a blue light-emitting unit.
3. The display of claim 1 wherein the quantum dot light source comprises a light emitting diode.
4. The display of claim 3, wherein the light emitting diode is a blue light source, a violet light source, or a white light source.
5. The display of claim 1, further comprising a driver circuit layer and a pixel definition layer, the driver circuit layer being located between the substrate and the pixel definition layer;
the pixel defining layer includes a plurality of openings, and each of the light emitting units is located in one of the openings.
6. The display of claim 1, further comprising a cover plate opposite the substrate, wherein the quantum dot film is formed on a side of the cover plate adjacent to the substrate.
7. The display of claim 1, further comprising a buffer protective layer on a side of the quantum dot film away from the substrate.
8. The display according to claim 1, wherein the organic light emitting unit includes a first electrode, an organic light emitting structure, and a second electrode in a direction away from the substrate;
the organic light-emitting structure comprises a light-emitting material layer and an auxiliary light-emitting layer, wherein the auxiliary light-emitting layer comprises at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, an electron injection layer and a hole blocking layer.
9. The display of claim 1 wherein the quantum dot film covers the quantum dot light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711382770.7A CN109950271B (en) | 2017-12-20 | 2017-12-20 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711382770.7A CN109950271B (en) | 2017-12-20 | 2017-12-20 | Display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109950271A CN109950271A (en) | 2019-06-28 |
| CN109950271B true CN109950271B (en) | 2022-03-25 |
Family
ID=67005120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711382770.7A Active CN109950271B (en) | 2017-12-20 | 2017-12-20 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109950271B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110379835B (en) * | 2019-07-17 | 2022-03-04 | 昆山国显光电有限公司 | Display panel, display device and preparation method of display panel |
| CN115083278A (en) * | 2022-06-24 | 2022-09-20 | 维沃移动通信有限公司 | Display module and electronic device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203179892U (en) * | 2013-04-09 | 2013-09-04 | 北京京东方光电科技有限公司 | Quantum dot light emitting diode display and display apparatus thereof |
| CN104037205A (en) * | 2014-07-09 | 2014-09-10 | 深圳市华星光电技术有限公司 | Oled pixel structure |
| CN104362255A (en) * | 2014-10-21 | 2015-02-18 | 深圳市华星光电技术有限公司 | White-light OLED (organic light emitting diode) device structure |
| WO2015108478A2 (en) * | 2014-01-16 | 2015-07-23 | Flatfrog Laboratories Ab | Oled display panel |
| CN105609656A (en) * | 2016-01-06 | 2016-05-25 | 京东方科技集团股份有限公司 | Organic light-emitting diode (OLED) and display device |
| WO2016176868A1 (en) * | 2015-05-07 | 2016-11-10 | 深圳市华星光电技术有限公司 | Quantum dot light-emitting diode display |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI580031B (en) * | 2013-12-26 | 2017-04-21 | 鴻海精密工業股份有限公司 | Color conversion layer, organic light emitting device, and liquid crystal display panel |
-
2017
- 2017-12-20 CN CN201711382770.7A patent/CN109950271B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203179892U (en) * | 2013-04-09 | 2013-09-04 | 北京京东方光电科技有限公司 | Quantum dot light emitting diode display and display apparatus thereof |
| WO2015108478A2 (en) * | 2014-01-16 | 2015-07-23 | Flatfrog Laboratories Ab | Oled display panel |
| CN104037205A (en) * | 2014-07-09 | 2014-09-10 | 深圳市华星光电技术有限公司 | Oled pixel structure |
| CN104362255A (en) * | 2014-10-21 | 2015-02-18 | 深圳市华星光电技术有限公司 | White-light OLED (organic light emitting diode) device structure |
| WO2016176868A1 (en) * | 2015-05-07 | 2016-11-10 | 深圳市华星光电技术有限公司 | Quantum dot light-emitting diode display |
| CN105609656A (en) * | 2016-01-06 | 2016-05-25 | 京东方科技集团股份有限公司 | Organic light-emitting diode (OLED) and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109950271A (en) | 2019-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8288784B2 (en) | Organic light emitting display device | |
| KR102412875B1 (en) | Organice light emitting diode display | |
| US9274372B2 (en) | Quantum dot light-emitting device and display apparatus | |
| US10692941B2 (en) | Organic light emitting diode display | |
| WO2020030042A1 (en) | Oled display substrate and manufacturing method therefor, and display apparatus | |
| US11251389B2 (en) | Quantum dot, quantum dot light emitting diode and quantum dot display device | |
| KR20150047401A (en) | Organic light emitting display apparatus | |
| US11158836B2 (en) | Light emitting device | |
| JPH10162958A (en) | El element | |
| US20190320517A1 (en) | Light-emitting apparatus and display device | |
| KR20200071168A (en) | Display device | |
| KR102409702B1 (en) | Organic Light Emitting Diode Display Device | |
| KR102067969B1 (en) | Organic light emitting diode display device | |
| US20190097150A1 (en) | Quantum dot light-emitting diode and display device | |
| KR20230127187A (en) | Organic light emitting display device | |
| KR20140082551A (en) | Organic light emitting display and method for fabricating the same | |
| JP2004288624A (en) | Electroluminescence display device | |
| CN109950271B (en) | Display device | |
| KR20230023695A (en) | Color filter and organic light emitting display device including the same | |
| KR20220163324A (en) | White organic light emitting device | |
| KR102168045B1 (en) | Organic Light Emitting Display Device | |
| JP2004158469A (en) | El device | |
| KR20180079104A (en) | Organic light emitting display device | |
| KR20160046202A (en) | Organic light emitting diode display | |
| JP2006054200A (en) | El element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 1568 Jiugong Road, Jinshan District, Shanghai, 201506 Applicant after: Shanghai Hehui optoelectronic Co.,Ltd. Address before: 1568 Jiugong Road, Jinshan District, Shanghai, 201506 Applicant before: EVERDISPLAY OPTRONICS (SHANGHAI) Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |