CN113888991B - Light-emitting panel, display panel, backlight module and display device - Google Patents
Light-emitting panel, display panel, backlight module and display device Download PDFInfo
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- CN113888991B CN113888991B CN202111248500.3A CN202111248500A CN113888991B CN 113888991 B CN113888991 B CN 113888991B CN 202111248500 A CN202111248500 A CN 202111248500A CN 113888991 B CN113888991 B CN 113888991B
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- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000002834 transmittance Methods 0.000 claims description 56
- 239000011521 glass Substances 0.000 claims description 30
- 230000005284 excitation Effects 0.000 claims description 22
- 239000002096 quantum dot Substances 0.000 claims description 9
- MCPLVIGCWWTHFH-UHFFFAOYSA-L methyl blue Chemical compound [Na+].[Na+].C1=CC(S(=O)(=O)[O-])=CC=C1NC1=CC=C(C(=C2C=CC(C=C2)=[NH+]C=2C=CC(=CC=2)S([O-])(=O)=O)C=2C=CC(NC=3C=CC(=CC=3)S([O-])(=O)=O)=CC=2)C=C1 MCPLVIGCWWTHFH-UHFFFAOYSA-L 0.000 claims description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims 1
- KQOMUSLQKQAVTD-UHFFFAOYSA-N sodium 4-hydroxy-3-[(4-nitrophenyl)diazenyl]naphthalene-1,5-disulfonic acid Chemical compound C1=CC2=C(C=C(C(=C2C(=C1)S(=O)(=O)O)O)N=NC3=CC=C(C=C3)[N+](=O)[O-])S(=O)(=O)O.[Na+] KQOMUSLQKQAVTD-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 12
- 230000007704 transition Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
Abstract
The embodiment of the invention discloses a light-emitting panel, a display panel, a backlight module and a display device. The light-emitting panel comprises a driving substrate and a plurality of blue light-emitting elements positioned on one side of the driving substrate; the light-emitting panel further comprises a first light-emitting area and a second light-emitting area, and the second light-emitting area is positioned at one side of the first light-emitting area, which is close to the edge of the light-emitting panel; the first light emitting region comprises a plurality of first blue light emitting elements, and the plurality of first blue light emitting elements comprises at least one first alpha blue light emitting element; the second light emitting region comprises a plurality of second blue light emitting elements, and the plurality of second blue light emitting elements comprises at least one second blue light emitting element; the light-emitting wavelength of the second light-emitting device is smaller than that of the first light-emitting device. The embodiment of the invention is used for improving the color cast problem of the edge of the light-emitting panel and improving the light-emitting consistency of the light-emitting panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of light emission, in particular to a light emitting panel, a display panel, a backlight module and a display device.
Background
In the prior art, because the edge of the excitation layer of the light-emitting panel has a failure area, the capability of the failure area for converting blue light into other color light is weaker than that of the normal area, so that the light-emitting color of the edge of the screen is bluish, and the light-emitting effect is affected.
Disclosure of Invention
The embodiment of the invention provides a light-emitting panel, a display panel, a backlight module and a display device, which are used for improving the problem of color cast of the edge of the light-emitting panel and improving the light-emitting consistency of the light-emitting panel.
In a first aspect, an embodiment of the present invention provides a light emitting panel, including a driving substrate and a plurality of blue light emitting elements located at one side of the driving substrate;
the light-emitting panel further comprises a first light-emitting area and a second light-emitting area, and the second light-emitting area is positioned on one side, close to the edge of the light-emitting panel, of the first light-emitting area;
the first light emitting region comprises a plurality of first blue light emitting elements, and the plurality of first blue light emitting elements comprises at least one first methyl blue light emitting element; the second light emitting region comprises a plurality of second blue light emitting elements, and the plurality of second blue light emitting elements comprises at least one second methyl blue light emitting element;
the light-emitting wavelength of the second light-emitting device is smaller than that of the first light-emitting device.
In a second aspect, an embodiment of the present invention further provides a display panel, including the light-emitting panel and a first glass plate, where the first glass plate is located on a light-emitting side of the light-emitting panel;
the first glass plate has a first transmittance for the light emitted by the first light-emitting device and a second transmittance for the light emitted by the second light-emitting device, wherein the first transmittance is greater than the second transmittance.
In a third aspect, an embodiment of the present invention further provides a backlight module, including the light-emitting panel described above.
In a fourth aspect, an embodiment of the present invention further provides a display device, including the above-mentioned backlight module, and further including a display panel located at a light emitting side of the backlight module;
the display panel comprises a second glass plate, wherein the second glass plate has a third transmittance for the light rays emitted by the first light emitting element and a fourth transmittance for the light rays emitted by the second light emitting element, and the third transmittance is larger than the fourth transmittance.
According to the technical scheme, the luminous panel comprises the first luminous area close to the center of the panel and the second luminous area close to the edge of the panel, and meanwhile, the second light-emitting element of the second luminous area is provided with the first light-emitting element of the second light-emitting element of which the luminous wavelength is smaller than that of the first light-emitting area.
Drawings
Fig. 1 is a schematic structural diagram of a direct type light emitting panel according to the prior art;
fig. 2 is a schematic structural diagram of a light-emitting panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another light-emitting panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another light-emitting panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another light-emitting panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another light-emitting panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an excitation layer according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of another excitation layer according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present invention are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in the context, it will also be understood that when an element is referred to as being formed "on" or "under" another element, it can be directly formed "on" or "under" the other element or be indirectly formed "on" or "under" the other element through intervening elements. The terms "first," "second," and the like, are used for descriptive purposes only and not for any order, quantity, or importance, but rather are used to distinguish between different components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Fig. 1 is a schematic structural diagram of a light-emitting panel according to the prior art, and refer to fig. 1. In the related art, a direct type light emitting panel is often manufactured using a blue LED30 as a backlight light emitting element. On the light emitting side of the direct type light emitting panel provided with the blue LED30, a color conversion layer is further required to be provided for converting the blue light emitted by the blue LED30 into light of other colors to form a backlight module or a display panel. However, since the color conversion material of the color conversion layer is generally a phosphor or a quantum dot material, these materials are easily reacted with substances such as water oxygen, and thus fail. The ability of the failure zone to convert blue light becomes weak and thus the backlight color of the failure zone is particularly shown to be bluish. And because substances such as water and oxygen often invade from the packaging structure at the edge of the display panel during production or use, a failure zone exists at the edge of the light-emitting panel.
Fig. 2 is a schematic structural diagram of a light-emitting panel according to an embodiment of the present invention, and refer to fig. 2. Based on the above-described problems in the prior art, an embodiment of the present invention provides a light-emitting panel including a driving substrate 1 and a plurality of blue light-emitting elements located on one side of the driving substrate 1;
the light-emitting panel further comprises a first light-emitting area 21 and a second light-emitting area 22, wherein the second light-emitting area 22 is positioned at one side of the first light-emitting area 21 close to the edge of the light-emitting panel;
the first light emitting region 21 includes a plurality of first blue light emitting elements including at least one first methyl blue light emitting element 311; the second light emitting region 22 includes a plurality of second blue light emitting elements including at least one second blue light emitting element 321;
the emission wavelength of the second light emitting element 321 is smaller than the emission wavelength of the first light emitting element 311.
The blue light emitting element may be any light emitting element capable of emitting blue light, and the first blue light emitting element and the second blue light emitting element may be the same type of light emitting element or different types of light emitting element. The second light emitting region 22 may be located at any edge of the first light emitting region 21, or may be disposed around the first light emitting region 21. Since the emission wavelength of the second light emitting element 321 is smaller than that of the first light emitting element 311, and the transmittance of the glass plate on the light emitting side of the light emitting panel for shorter wavelength blue light is lower than that for longer wavelength blue light. Accordingly, the second light emitting region 22 may be provided for a specific location of the light emitting panel failure region. Because the glass plate has lower transmittance for blue light with shorter wavelength, the light emitting wavelength of the second light emitting element 321 of the second light emitting region 22 is smaller than the light emitting wavelength of the first light emitting element 311 of the first light emitting region 21, so that when light emitted by the light emitting panel passes through the glass plate, the lower transmittance of the second light emitting region 22 compensates the blue-shift problem of the second light emitting region 22, the blue-shift problem of the second light emitting region 22 can be corrected, the light emitting consistency of the light emitting panel is improved, and the light emitting quality is improved.
For the formation of the light-emitting panel, the light-emitting element may be transferred on the driving substrate 1, and then a protective adhesive may be formed on the side of the driving substrate 1 having the light-emitting element by spraying or film pressing.
It should be noted that, in the embodiment of the present invention, specific light emission wavelengths of the first light emitting device 311 and the second light emitting device 321 are not limited, and it is only required to satisfy that the first light emitting device 311 and the second light emitting device 321 can emit blue light, and ensure that the light emission wavelength of the second light emitting device 321 is smaller than the light emission wavelength of the first light emitting device 311.
In summary, the light-emitting panel provided by the embodiment of the invention is provided with the light-emitting panel comprising the first light-emitting area close to the center of the panel and the second light-emitting area close to the edge of the panel, and meanwhile, the light-emitting wavelength of the second light-emitting element of the second light-emitting area is smaller than that of the first light-emitting element of the first light-emitting area.
Based on the above embodiments, the blue light emitting element may be a micro blue light emitting diode, such as a blue micro-LED and/or a blue mini-LED. The blue light emitting element is arranged to be a miniature blue light emitting diode, the volume of the blue light emitting element can be reduced, and more blue light emitting elements can be arranged on the substrate with the same area, so that a finer light emitting effect is realized. On the basis of the above embodiment, fig. 3 is a schematic structural view of another light-emitting panel provided by the embodiment of the present invention, fig. 4 is a schematic structural view of another light-emitting panel provided by the embodiment of the present invention, and referring to fig. 3 and fig. 4, the second blue light-emitting element includes a plurality of second light-emitting elements 321 and a plurality of second light-emitting elements 322;
the emission wavelength of the second light emitting element 322 is less than or equal to the emission wavelength of the first light emitting element 311, and the wavelength difference between the emission wavelength of the second light emitting element 321 and the emission wavelength of the first light emitting element 311 is greater than the wavelength difference between the emission wavelength of the second light emitting element 322 and the emission wavelength of the first light emitting element 311.
The emission wavelength of the second blue light emitting element 322 may be between the emission wavelength of the first blue light emitting element 311 and the emission wavelength of the second blue light emitting element 321, or the emission wavelength of the second blue light emitting element 322 may be equal to the emission wavelength of the first blue light emitting element 311. The emission wavelength of the second light emitting element 321 and the emission wavelength of the second light emitting element 322 may be determined according to actual needs, for example, may be determined according to the color cast condition of the failure area in actual use.
Further, the second light emitting areas 22 are provided with the plurality of second light emitting devices 321 and the plurality of second light emitting devices 322 with different light emitting wavelengths, and the light emitting wavelength of the second light emitting devices 322 is set between the light emitting wavelength of the first light emitting device 311 and the light emitting wavelength of the second light emitting device 321, so that the transmittance of the glass plate for the light emitting light of the second light emitting device 322 is between the transmittance of the light emitting light of the second light emitting device 321 and the transmittance of the light emitting light of the first light emitting device 311, thereby reducing the difference of the light transmittance of the light emitting light between the first light emitting area 21 and the second light emitting area 22 and improving the uniformity of the whole light emitting of the light emitting panel. Or, the light emission wavelength of the second blue light emitting element 322 is set to be equal to the light emission wavelength of the first blue light emitting element 311, so that the transmittance of the glass plate to the light emission light of the second blue light emitting element 322 is the same as the transmittance to the light emission light of the first blue light emitting element 311, and the difference of the light emission light transmittance between the first light emitting area and the second light emitting area can be reduced, so that the uniformity of the light emission of the whole light emitting panel can be improved.
With continued reference to fig. 3 and 4, optionally, the second light emitting devices 321 and 322 are alternately arranged in sequence along the first direction X and/or the second direction Y; the first direction X and the second direction Y are both parallel to the plane of the drive substrate 1 and are both parallel to the edge of the drive substrate 1.
The second light emitting devices 321 and 322 may be alternately arranged in sequence in the row direction of the light emitting devices. The second light emitting devices 321 and 322 may also be alternately arranged in order in the column direction of the light emitting devices. Alternatively, the second light emitting element 321 and the second light emitting element 322 may be alternately arranged in order like a checkerboard in both the row direction and the column direction of the light emitting elements. By the arrangement, the light emitted by the second light emitting element 321 and the second light emitting element 322 can be uniformly dispersed in the second light emitting region 22 of the light emitting panel. And the light emitting effect of the second area in the light emitting panel is more uniform, and the light emitting uniformity of the light emitting panel is further improved.
On the basis of the above embodiment, fig. 5 is a schematic structural diagram of another light-emitting panel according to an embodiment of the present invention, and referring to fig. 5, the first blue light-emitting elements include a plurality of first blue light-emitting elements 311 and a plurality of first blue light-emitting elements 312;
the emission wavelength of the first light emitting element 312 is greater than or equal to the emission wavelength of the second light emitting element 321, and the wavelength difference between the emission wavelength of the first light emitting element 311 and the emission wavelength of the second light emitting element 321 is greater than the wavelength difference between the emission wavelength of the first light emitting element 312 and the emission wavelength of the second light emitting element 321.
The light emitting wavelength of the first blue light emitting element 312 is between the light emitting wavelength of the first blue light emitting element 311 and the light emitting wavelength of the second blue light emitting element 321, or the light emitting wavelength of the first blue light emitting element 312 is equal to the light emitting wavelength of the second blue light emitting element 321. Further, the first light-emitting areas 21 are provided with the plurality of first light-emitting devices 311 and the plurality of first light-emitting devices 312 with different light-emitting wavelengths, and the light-emitting wavelengths of the first light-emitting devices 322 are set between the light-emitting wavelengths of the first light-emitting devices 311 and the light-emitting wavelengths of the second light-emitting devices 321, so that the transmittance of the glass plate for the light-emitting light of the first light-emitting devices 312 is between the transmittance of the light-emitting light of the second light-emitting devices 321 and the transmittance of the light-emitting light of the first light-emitting devices 311, the difference of the light-emitting light transmittance between the first light-emitting areas 21 and the second light-emitting areas 22 is reduced, and the uniformity of the light-emitting panel overall is improved. Alternatively, the light emission wavelength of the first blue-emitting element 312 is set to be equal to the light emission wavelength of the second blue-emitting element 321, so that the transmittance of the glass plate to the light emission light of the first blue-emitting element 312 is the same as the transmittance to the light emission light of the second blue-emitting element 321, and the difference of the light emission light transmittance between the first light-emitting region 21 and the second light-emitting region 22 can be reduced, thereby improving the uniformity of the light emission of the whole light-emitting panel
Further, the arrangement of the first light emitting device 311 and the first light emitting device 312 in the first light emitting area 21 may be determined according to actual needs. For example, the first light emitting element 311 and the first light emitting element 312 may be disposed in a checkerboard arrangement within the first light emitting region 21. The light emitting elements may be arranged progressively in such a way that the closer to the edge, the greater the proportion of light emitting devices per unit area of the first light emitting element 312. Or the first blue light emitting elements 312 of a single row and/or column are provided only at the edges of the first light emitting region 21. The first light emitting element 312 and the first light emitting element 311 may be disposed in a checkered arrangement at the edge of the first light emitting region 21. The arrangement mode is beneficial to making the luminous transmittance transition between the first luminous area 21 and the second luminous area 22 uniform, the luminous effect of the luminous panel is more uniform, and the uniformity of the emitted light is further improved.
On the basis of the above embodiment, fig. 6 is a schematic structural diagram of another light-emitting panel according to the embodiment of the present invention, and referring to fig. 6, the light-emitting panel further includes a third light-emitting region 23, where the third light-emitting region 23 is located at a side of the first light-emitting region 21 near the edge of the light-emitting panel, and located at a side of the second light-emitting region 22 far from the edge of the light-emitting panel;
the third light emitting region 23 includes a plurality of third blue light emitting elements including at least one third blue light emitting element 331;
the emission wavelength of the third light emitting element 331 is smaller than the emission wavelength of the first light emitting element 311 and larger than the emission wavelength of the second light emitting element 321.
In this case, the light-emitting region may be added between the first light-emitting region 21 and the second light-emitting region 22, so that the smoothness of the transition of the light-emitting effect between the first light-emitting region 21 and the second light-emitting region 22 may be further improved. The light emission wavelength of the third light emitting element 331 in the third light emitting region 23 is between the light emission wavelength of the first light emitting element 311 and the light emission wavelength of the second light emitting element 321, so that the transmittance of the glass plate for the light emission of the third light emitting element 331 is between the transmittance for the light emission of the second light emitting element 321 and the transmittance for the light emission of the first light emitting element 311, the difference of the light emission transmittance between the first light emitting region 21 and the second light emitting region 22 is reduced, the transition of the light transmittance between the first light emitting region 21 and the second light emitting region 22 is more natural, the problem of obvious boundary between the first light emitting region 21 and the second light emitting region 22 due to the difference of the light transmittance of the light emitting elements is avoided, and the uniformity of the whole light emitting of the light emitting panel is improved.
Alternatively, two or more transition regions may be added between the first light emitting region 21 and the second light emitting region 22, and the light emitting wavelengths of the light emitting elements on all the transition regions are smaller than the light emitting wavelength of the first light emitting element 311 and larger than the light emitting wavelength of the second light emitting element 321, and the longer the light emitting wavelength of the blue light emitting element in the transition region closer to the first light emitting region 21, the shorter the light emitting wavelength of the blue light emitting element in the transition region closer to the second light emitting region 22. By arranging the transition region in the above manner, the difference of luminous light transmittance between the first luminous region 21 and the second luminous region 22 can be reduced, so that the transition of the light transmittance between the first luminous region 21 and the second luminous region 22 is more natural, the problem of obvious boundary between the first luminous region 21 and the second luminous region 22 caused by different light transmittance of the luminous elements is avoided, and the uniformity of the whole light emission of the luminous panel is improved.
In the prior art, there is often only one blue light emitting element with a light emitting wavelength on a light emitting panel, and for the purpose of controlling the light emitting difference of the light emitting panel, it is necessary to control the maximum wavelength difference between the light emitting wavelengths of any two blue light emitting elements used by the light emitting panel to be |a|, and a may be + -3.5nm, for example. Therefore, in the manufactured blue light emitting element, the blue light emitting element having the maximum wavelength difference |a| between the emission wavelengths of any two blue light emitting elements, which is too short or too long to meet the emission wavelengths, is discarded, so that not only is the resource wasted, but also the manufacturing cost of the light emitting panel is increased.
Based on the problems in the prior art, the embodiment of the invention provides the following technical scheme. Optionally, the maximum wavelength difference between the emission wavelengths of any two first blue light emitting elements is |a1|;
the maximum wavelength difference between the emission wavelengths of any two second blue light emitting elements is |a2|;
the maximum wavelength difference between the emission wavelength of the second blue light emitting element and the emission wavelength of the first blue light emitting element is |a3|;
wherein |a3| > |a1|, and |a3| > |a2|.
The light-emitting panel in the embodiment of the invention further comprises a second blue light-emitting element on the basis of comprising the first blue light-emitting element. And since the maximum wavelength difference between the emission wavelength of the second blue light emitting element and the emission wavelength of the first blue light emitting element is |a3|, and |a3| > |a1|. Thus, a blue light emitting element which does not originally meet the standard of the first blue light emitting element can be made possible to be used as the second blue light emitting element. For example, a1= ++ -3.5nm, a2= ++ -3.5nm and a3= ++ -5nm may be set. Even if the selection standards of the first blue light emitting element and the second blue light emitting element are not reduced, the yield of the blue light emitting element can be improved due to the fact that the light emitting wavelengths required by the first blue light emitting element and the second blue light emitting element are different, and therefore manufacturing cost of the light emitting panel is reduced, and resource utilization rate is improved.
Fig. 7 is a schematic structural view of an excitation layer according to an embodiment of the present invention, and fig. 8 is a schematic structural view of another excitation layer according to an embodiment of the present invention, and referring to fig. 7 and 8, the light-emitting panel further includes an excitation layer 4 at least partially surrounding the blue light-emitting element 3;
the emission wavelength of the blue light emitting element 3 is smaller than the excitation wavelength of the excitation layer 4.
The excitation layer 4 may be provided on the peripheral side of the blue light emitting element 3, or may be provided on the light emitting side of the blue light emitting element 3. The excitation layer 4 may include a photoluminescent material such as a quantum dot material or a fluorescent powder, and the quantum dot layer or the fluorescent layer may be formed from the photoluminescent material. The excitation wavelength of the excitation layer 4 is larger than the emission wavelength of the blue light emitting element 3, and the excitation layer 4 can generate light rays of red light, green light, white light or the like under the excitation of blue light. The excitation layer 4 may be a film layer coated or doped with one or more photoluminescent materials, and emits white light after being laser-emitted by the blue light emitting element 3 to form a backlight structure, as shown in fig. 7. Specifically, the excitation layer 4 may be coated or doped with a mixture of a quantum dot material capable of being excited to red light and a quantum dot material capable of being excited to green light, or may be coated or doped with a quantum dot material capable of being excited to yellow light. Further, the excitation layer 4 may be divided into a plurality of different light emitting areas in a dot matrix form, and the different light emitting areas emit different color lights to form a color display panel, as shown in fig. 8. Specifically, a plurality of red sub-pixels 41 are formed by adding a quantum dot material capable of being excited to red light to a dot matrix, a plurality of green sub-pixels 42 are formed by adding a quantum dot material capable of being excited to green light to a dot matrix, and a plurality of blue sub-pixels 43 are formed by providing a dot matrix capable of transmitting blue light. The arrangement of the red sub-pixel 41, the green sub-pixel 42 and the blue sub-pixel 43 can be determined according to actual needs. By the technical solution of dividing the sub-pixels on the excitation layer 4, a color display function can be achieved.
On the basis of the above embodiment, the embodiment of the present invention further discloses a display panel, and fig. 9 is a schematic structural diagram of the display panel provided by the embodiment of the present invention, and referring to fig. 9, the display panel provided by the embodiment of the present invention includes the light-emitting panel 5 and the first glass plate 6 described in the above embodiment, where the first glass plate 6 is located on the light-emitting side of the light-emitting panel 5;
the first glass plate 6 has a first transmittance for the light emitted from the first light-emitting element and a second transmittance for the light emitted from the second light-emitting element, wherein the first transmittance is greater than the second transmittance.
Since the longer the wavelength of blue light, the higher the light transmittance, the shorter the wavelength, the lower the light transmittance, when the blue light penetrates the glass. Therefore, the luminous transmittance of the first light-emitting device is higher than that of the second light-emitting device. Compared with the luminous rays of the first light-emitting component, the proportion of the luminous rays of the second light-emitting component positioned at the edge of the display panel, which penetrate through the first glass plate 6, is lower, so that the problem that the edge of the display panel is bluish in the prior art is counteracted, and the display effect is improved.
It should be noted that, only a part of the film structure of the display panel in the embodiment of the present invention is shown in the drawings, and any film layer that does not affect the function of the embodiment of the present invention may be added on the upper surface of the first glass plate 6, the lower surface of the light-emitting panel 5, or between the light-emitting panel 5 and the first glass plate 6 shown in fig. 9.
On the basis of the above embodiment, the embodiment of the present invention further provides a backlight module, and fig. 10 is a schematic structural diagram of the backlight module provided by the embodiment of the present invention, as shown in fig. 10, and the backlight module 7 includes the light-emitting panel 5 described in the above embodiment.
The backlight module in the embodiment of the invention includes any one of the light-emitting panels, so that the backlight module has the beneficial effects of the corresponding light-emitting panel, and the description thereof is omitted.
Further, the backlight module 7 may further include other structures (not shown in the figure), such as a light homogenizing film, a brightness enhancement film, and a frame, to ensure the normal operation of the backlight module.
Based on the above embodiment, the backlight module includes a plurality of backlight light emitting areas, and the light emitting brightness of the two backlight light emitting areas is different.
The backlight module can respectively adjust the brightness according to different light-emitting areas, and the display panel using the backlight module has the advantage of achieving the screen effect of high dynamic range, so that the picture is finer.
On the basis of the above embodiment, the embodiment of the present invention further provides a display device, and fig. 11 is a schematic structural diagram of the display device provided by the embodiment of the present invention, and referring to fig. 11, the display device provided by the embodiment of the present invention includes the backlight module 7 described in the above embodiment, and further includes a display panel 8 located on a light emitting side of the backlight module;
the display panel 8 includes a second glass plate 81, and the second glass plate 81 has a third transmittance for the light emitted from the first light emitting element and a fourth transmittance for the light emitted from the second light emitting element, wherein the third transmittance is larger than the fourth transmittance.
Since the longer the wavelength of blue light, the higher the light transmittance, the shorter the wavelength, the lower the light transmittance, when the blue light penetrates the glass. Blue light of a different wavelength may in this case be filtered through the second glass plate 81 in the display panel 8. More blue light with shorter wavelengths is filtered out than blue light with longer wavelengths. The proportion of the light emitted from the second light emitting element located at the edge of the backlight module 7 passing through the second glass plate 81 is lower than that of the light emitted from the first light emitting element. Therefore, the problem that the edge of the display panel is bluish in the prior art is offset, and the display effect is improved.
It should be noted that, only a part of the film structure of the display device in the embodiment of the present invention is shown in the drawings, and any film layer that does not affect the function of the embodiment of the present invention may be added on the upper surface of the display panel 8, the lower surface of the backlight module 7 or between the backlight module 7 and the display panel 8 shown in fig. 11.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (12)
1. A light-emitting panel, comprising a driving substrate and a plurality of blue light-emitting elements positioned on one side of the driving substrate;
the light-emitting panel further comprises a first light-emitting area and a second light-emitting area, and the second light-emitting area is positioned on one side, close to the edge of the light-emitting panel, of the first light-emitting area;
the first light emitting region comprises a plurality of first blue light emitting elements, and the plurality of first blue light emitting elements comprises at least one first methyl blue light emitting element; the second light emitting region comprises a plurality of second blue light emitting elements, and the plurality of second blue light emitting elements comprises at least one second methyl blue light emitting element;
wherein the light emitting wavelength of the second light emitting element is smaller than the light emitting wavelength of the first light emitting element;
the second blue light emitting element comprises a plurality of the second light emitting elements and a plurality of second blue light emitting elements;
the light emitting wavelength of the second light emitting element is less than or equal to the light emitting wavelength of the first light emitting element, and the wavelength difference between the light emitting wavelength of the second light emitting element and the light emitting wavelength of the first light emitting element is greater than the wavelength difference between the light emitting wavelength of the second light emitting element and the light emitting wavelength of the first light emitting element.
2. The light-emitting panel according to claim 1, wherein the second light-emitting element and the second light-emitting element are alternately arranged in order in the first direction and/or the second direction; the first direction and the second direction are parallel to the plane where the driving substrate is located, and are parallel to the edge of the driving substrate.
3. The light-emitting panel according to claim 1, wherein the first blue light-emitting element includes a plurality of the first methyl blue light-emitting elements and a plurality of first ethyl blue light-emitting elements;
the light emitting wavelength of the first light emitting element is greater than or equal to the light emitting wavelength of the second light emitting element, and the wavelength difference between the light emitting wavelength of the first light emitting element and the light emitting wavelength of the second light emitting element is greater than the wavelength difference between the light emitting wavelength of the first light emitting element and the light emitting wavelength of the second light emitting element.
4. The light-emitting panel of claim 1, further comprising a third light-emitting region located on a side of the first light-emitting region proximate to the light-emitting panel edge and on a side of the second light-emitting region distal to the light-emitting panel edge;
the third light emitting region includes a plurality of third blue light emitting elements including at least one third blue light emitting element;
the light emitting wavelength of the third light emitting element is smaller than the light emitting wavelength of the first light emitting element and larger than the light emitting wavelength of the second light emitting element.
5. The light-emitting panel according to claim 1, wherein a maximum wavelength difference between emission wavelengths of any two of the first blue light-emitting elements is |a1|;
the maximum wavelength difference between the light emitting wavelengths of any two of the second blue light emitting elements is |a2|;
the maximum wavelength difference between the emission wavelength of the second blue light emitting element and the emission wavelength of the first blue light emitting element is |a3|;
wherein |a3| > |a1|, and |a3| > |a2|.
6. The light-emitting panel of claim 1, further comprising an excitation layer at least partially surrounding the blue light-emitting element;
the light emitting wavelength of the blue light emitting element is smaller than the excitation wavelength of the excitation layer.
7. The light-emitting panel of claim 6, wherein the excitation layer comprises a quantum dot layer or a fluorescent layer.
8. The light-emitting panel of claim 1, wherein the blue light-emitting element comprises a micro blue light-emitting diode.
9. A display panel comprising the light-emitting panel of any one of claims 1-8 and a first glass plate, the first glass plate being positioned on the light-emitting side of the light-emitting panel;
the first glass plate has a first transmittance for the light emitted by the first light-emitting device and a second transmittance for the light emitted by the second light-emitting device, wherein the first transmittance is greater than the second transmittance.
10. A backlight module comprising the light-emitting panel according to any one of claims 1-8.
11. A backlight module according to claim 10, wherein the backlight module comprises a plurality of backlight emitting areas, and the two backlight emitting areas have different light emitting brightness.
12. A display device, comprising the backlight module of claim 10 or 11, and further comprising a display panel positioned on a light emitting side of the backlight module;
the display panel comprises a second glass plate, wherein the second glass plate has a third transmittance for the light rays emitted by the first light emitting element and a fourth transmittance for the light rays emitted by the second light emitting element, and the third transmittance is larger than the fourth transmittance.
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