CN114724470B - Micro LED chip array sheet and micro LED display module - Google Patents
Micro LED chip array sheet and micro LED display module Download PDFInfo
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- CN114724470B CN114724470B CN202210366823.0A CN202210366823A CN114724470B CN 114724470 B CN114724470 B CN 114724470B CN 202210366823 A CN202210366823 A CN 202210366823A CN 114724470 B CN114724470 B CN 114724470B
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Abstract
The invention provides a micro LED chip array sheet and a micro LED display module. The micro LED chip array sheet comprises a light-emitting layer and a light-guiding layer; the light guide layer is arranged on a light path of the light emitting layer, light rays emitted by the light emitting layer are refracted through the light guide layer to form first light rays and second light rays, the first light rays are conducted in a direction close to an optical axis of the light emitting layer, and the second light rays are conducted in a direction far away from the optical axis; at least part of the light guide layer is arranged on the light path of the second light ray, and makes the second light ray reflect to the direction of the optical axis for conduction. When the micro LED chip array sheet of this embodiment is used, the light emitted by the light emitting layer may be refracted and reflected by the light guiding layer, so that the first light is deflected and conducted towards the direction of the optical axis of the light emitting layer, and at the same time, the second light is reflected and conducted towards the direction far away from the optical axis, so that the second light is deflected and conducted towards the direction of the optical axis, thereby improving the problem of chromatic light crosstalk.
Description
Technical Field
The invention relates to the technical field of micro LED chips, in particular to a micro LED chip array sheet and a micro LED display module.
Background
The existing Micro-LED colorization scheme mainly utilizes the combination of an LED blue light monochromatic chip and red and green quantum dot materials to realize three-color display. However, the full color scheme of the current quantum dot material has a problem of light crosstalk, because blue light emitted by the MQW layer after power-on can be scattered at a larger angle.
For example, if only red light is required to be generated, the program controls the MQWs corresponding to the red light, but the MQWs of other colors of light do not emit light, but in actual use, the red light is obliquely emitted into the quantum dot region of the green light, so that the green quantum dot material is excited by a small amount to generate the green light, and the display effect of the red light is affected.
Therefore, how to improve the problem that color crosstalk easily occurs in the full-color Micro-LED scheme using the quantum dot material to affect the display effect is an important issue to be solved in the industry.
Disclosure of Invention
The invention provides a Micro LED chip array sheet and a Micro LED display module, which are used for solving the problem that color light crosstalk is easy to occur to influence the display effect in a full-color Micro-LED scheme adopting quantum dot materials in the prior art.
The invention provides a miniature LED chip array sheet, which comprises:
a light emitting layer; and
the light guide layer is arranged on a light path of the light emitting layer, light rays emitted by the light emitting layer are refracted through the light guide layer to form first light rays and second light rays, the first light rays are conducted in a direction close to an optical axis of the light emitting layer, and the second light rays are conducted in a direction far away from the optical axis; at least part of the light guide layer is arranged on the light path of the second light ray, and makes the second light ray reflect to the direction of the optical axis for conduction.
According to one embodiment of the present invention, the light guiding layer includes a base portion and a plurality of light guiding portions, the plurality of light guiding portions are uniformly provided at one side of the base portion, the light rays are refracted through the light guiding portions, and an outer wall of the light guiding portions is used for reflecting the second light rays;
and/or the refractive index of the light guide portion is in the range of 2-3.
According to an embodiment of the present invention, the light guide portion is formed by photolithography and etching processing;
and/or the cross section of the light guiding portion in a direction parallel to the optical axis includes a triangle, and the tip of the light guiding portion is convex in a direction away from the base portion.
The invention also provides a micro LED display module, which comprises:
a light emitting layer including a plurality of light emitting parts;
the quantum dot sheet comprises a plurality of quantum dot parts, wherein the quantum dot parts are arranged on the light path of the light-emitting part and are in one-to-one correspondence with the light-emitting part;
a photoconductive layer disposed between the light emitting layer and the quantum dot sheet, wherein the first light is conducted in a direction toward the quantum dot portion corresponding to the light emitting portion, and the second light is conducted in a direction away from the quantum dot portion corresponding to the light emitting portion; at least part of the light guide layer is arranged on the light path of the second light ray, and makes the second light ray reflect to the direction of the quantum dot part corresponding to the light emitting part for conduction.
According to one embodiment of the present invention, the quantum dot sheet further includes a filter layer disposed on a side of the quantum dot portion corresponding to the light emitting portion away from the light emitting portion, the filter layer being capable of transmitting the same light as the color light of the quantum dot portion.
According to one embodiment of the present invention, the number of the light emitting parts and the quantum dot parts is at least three, wherein at least three groups of the filter layers can transmit blue light, red light and green light, respectively.
According to one embodiment of the invention, the quantum dot sheet further comprises a quantum dot protection layer, wherein the quantum dot protection layer is at least partially arranged on one side of the quantum dot part facing the light emitting part.
According to one embodiment of the invention, the quantum dot sheet further comprises a substrate layer, wherein the substrate layer is arranged on one side of the quantum dot part far away from the quantum dot protection layer.
According to one embodiment of the present invention, the quantum dot sheet further includes a light blocking portion at least partially disposed between two adjacent quantum dot portions.
According to one embodiment of the present invention, when the number of the light emitting parts and the quantum dot parts is at least three, at least one group of the light emitting parts is used for emitting blue light, and the other at least two groups of the light emitting parts can respectively emit red light and green light;
and/or when the number of the light emitting parts and the quantum dot parts is at least three, wherein the color light emitted by at least one group of the light emitting parts is any one of blue color light, red color light and green color light, and at least two groups of the quantum dot parts are used for converting the color light into other two of the blue color light, the red color light and the green color light.
The embodiment of the invention has the following beneficial effects:
when the micro LED chip array sheet of this embodiment is used, light emitted by the light emitting layer can be refracted and reflected by the light guiding layer, so that the first light is deflected and conducted towards the direction of the optical axis of the light emitting layer, and simultaneously, the second light conducted towards the direction far away from the optical axis is reflected, so that the second light is deflected and conducted towards the direction of the optical axis, thereby improving the problem of chromatic light crosstalk, and improving the brightness of the light emitting layer.
In the micro LED display module of this embodiment, by setting the micro LED chip array sheet and the quantum dot sheet in any one of the above embodiments, the color light emitted by the light emitting portion of the micro LED chip array sheet is conducted toward the corresponding quantum dot portion, so that the problem of crosstalk caused by oblique emission of the color light is improved, and the color display effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a schematic diagram of a micro LED display module according to an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic diagram of a quantum dot sheet according to an embodiment of the present invention;
reference numerals:
10. a micro LED display module; 100. a micro LED chip array sheet; 110. a light emitting layer; 111. a light emitting section; 1111. a first light ray; 1111', a first light ray; 1112. a second light ray; 112. an isolation part; 120. a light guiding layer; 121. a base portion; 122. a light guide section; 200. quantum dot sheets; 210. a quantum dot section; 220. a filter layer; 230. a quantum dot protective layer; 240. a substrate layer; 250. and a light blocking part.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a micro LED display module 10, which includes a micro LED chip array sheet 100 and a quantum dot sheet 200; the micro LED chip array sheet 100 includes a light emitting layer 110 and a light guiding layer 120; the light guiding layer 120 is disposed on the light path of the light emitting layer 110, and the light emitted by the light emitting layer 110 is refracted by the light guiding layer 120 to form a first light 1111 and a second light 1112, where the first light 1111 is conducted in a direction close to the optical axis of the light emitting layer 110, and the second light 1112 is conducted in a direction far from the optical axis; wherein at least a portion of the light guiding layer 120 is disposed on the optical path of the second light 1112, and reflects the second light 1112 to be conducted toward the optical axis.
When the micro LED chip array sheet 100 of the present embodiment is used, the light emitted by the light emitting layer 110 can be refracted and reflected by the light guiding layer 120, so that the first light 1111 is deflected and conducted towards the direction of the optical axis of the light emitting layer 110, and the second light 1112 far away from the optical axis is reflected at the same time, so that the second light 1112 is deflected and conducted towards the direction of the optical axis, so that the light emitted by the large-angle scattering is converted into the light conducted towards the optical axis, and the light emitted by the large-angle scattering is prevented from being deflected from the conducting direction of the optical axis, thereby improving the problem of chromatic light crosstalk and improving the brightness of the light emitting layer 110.
Specifically, the light emitting layer 110 includes a plurality of light emitting parts 111; the quantum dot sheet 200 includes a plurality of quantum dot portions 210, and the quantum dot portions 210 are disposed on the optical path of the light emitting portion 111 and are in one-to-one correspondence with the light emitting portion 111; the photoconductive layer 120 is disposed between the light emitting layer 110 and the quantum dot sheet 200, the first light 1111 is conducted toward the quantum dot portion 210 corresponding to the light emitting portion 111, and the second light 1112 is conducted away from the quantum dot portion 210 corresponding to the light emitting portion 111; at least a portion of the light guiding layer 120 is disposed on the optical path of the second light 1112, and reflects the second light 1112 to be conducted toward the quantum dot portion 210 corresponding to the light emitting portion 111.
In the micro LED display module 10 of the present embodiment, by arranging the micro LED chip array sheet 100 and the quantum dot sheet 200 in any one of the above embodiments, the color light emitted from the light emitting portion 111 of the micro LED chip array sheet 100 can be conducted towards the corresponding quantum dot portion 210, so that the problem of crosstalk caused by oblique emission of the color light is improved, and the color display effect is improved. In an embodiment, the micro LED chip array sheet 100 and the quantum dot sheet 200 may be aligned and attached by using a flip chip bonding apparatus, so as to obtain the micro LED display module 10.
Referring to fig. 2, in an embodiment, the light guiding layer 120 includes a base portion 121 and a plurality of light guiding portions 122, the plurality of light guiding portions 122 are uniformly disposed on one side of the base portion 121, the light is refracted through the light guiding portions 122, and an outer wall of the light guiding portions 122 is used for reflecting the second light 1112.
In this embodiment, by providing the light guide portion 122 on the base portion 121 to adjust the light emitted by the light emitting layer 110 in a refractive, reflective or other manner, the first light 1111 and the second light 1112 can both be conducted towards the corresponding quantum dot portion 210, so as to avoid the problem of oblique incidence crosstalk of color light; in the process of preparing the light guiding layer 120 and the light emitting layer 110, the light guiding portion 122 is provided with a corresponding light guiding structure to adjust light rays, and at this time, connection and fixation, such as adhesion, bonding, etc., can be performed between the base portion 121 and the light emitting layer 110, so as to ensure connection stability of the light guiding layer 120. Note that, in this embodiment, the light guiding layer 120 may be a-GaN layer.
Further, a microlens array (not shown) is provided above the light guiding layer 120, the microlens array being in one-to-one correspondence with the light emitting sections 111, the microlenses protruding toward the quantum dot sections 210. On the basis of converging, refracting and reflecting light rays of the light guide layer 120, the light rays emitted by the light emitting layer 110 are all converged at the quantum dot part 210 corresponding to the upper part through the light converging action of the micro lens, so that the problem of light crosstalk is further avoided, and meanwhile, the brightness of the light emitting layer 110 is improved. Specifically, a microlens array may be adopted or prepared, and by attaching the quantum dot sheet 200 onto the light guiding layer 120 in an aligned manner, the quantum dot sheet 200 is attached onto the microlens array in an aligned manner again, so that the micro LED chip array sheet 100, the light guiding layer 120, the microlens array and the quantum dot sheet 200 are finally aligned respectively, and all the light emitted by the light emitting layer 110 is conducted along the corresponding optical axis direction.
Specifically, the refractive index of the light guide portion 122 ranges from 2 to 3.
By adopting the light guiding portion 122 with a refractive index in the range of 2-3, the light emitted by the light emitting layer 110 can be refracted to form the first light 1111 and the second light 1112 which are conducted towards different directions, so that the second light 1112 can be reflected on the outer wall of the light guiding portion 122, and the effect of deflecting the light path of the second light 1112 is achieved.
In a preferred embodiment, the refractive index of the light guiding portion 122 may be 2.45, as shown in fig. 2, when the second light 1112 exits the light guiding portion 122 through the light guiding portion 122, the incident angles of the second light 1112 entering the air shown in fig. 2 are defined as a1 and a2, the refractive angles are b1 and b2, the incident angle of the optical dense medium a1 is smaller than the refractive angle b1 of the medium according to the optical principle, the light is collected, for example, a1 is 20 °, and b1=arcsin (a 1) ×2.45] =56°; as shown in fig. 2, when the incident angle is a2, the refracted ray b2 is reflected and concentrated toward the optical axis again. Of course, in some embodiments, the refractive index of the light guiding portion 122 may be selected according to the actual design requirements of the micro LED display module 10, for example, 2, 2.10, 2.55, 2.70, 2.80, 3, specifically, according to the light path orientations of the first light beam 1111 and the second light beam 1112, which is not limited herein.
In one embodiment, the light guide 122 is formed by photolithography and etching;
referring to fig. 1, in the process of manufacturing the micro LED chip array chip 100 of the present embodiment, after the light emitting layer 110 is peeled off from the sapphire substrate, the GaN light guiding layer 120 is fabricated on the upper layer by photolithography and etching techniques, so as to achieve a light focusing effect. The preparation method comprises the following specific steps:
s101, providing a light-emitting layer, then stripping a sapphire substrate, and cleaning a gallium layer remained on a U-GaN layer of the light-emitting layer;
s102, spin coating photoresist on the U-GaN layer, then photoetching a pattern of the photoconductive layer 120, and then directly etching a structure of the photoconductive part 122 on the surface of the photoconductive layer 120 through ICP.
Referring to fig. 2, in an embodiment, the cross section of the light guiding portion 122 in a direction parallel to the optical axis includes a triangle, and the tip of the light guiding portion 122 protrudes in a direction away from the base portion 121.
It will be appreciated that by arranging the light guide 122 in a triangular shape, the second light 1112 may be directed towards another light guide 122 adjacent to the light guide 122 after being refracted by the light guide 122, after which the second light 1112 may be reflected by the outer wall of the light guide 122 such that it is directed towards the optical axis.
Further, referring to fig. 1, the quantum dot sheet 200 further includes a filter layer 220, wherein the filter layer 220 is disposed on a side of the quantum dot portion 210 corresponding to the light emitting portion 111 away from the light emitting portion 111, and the filter layer 220 is capable of transmitting the same light as the color light of the quantum dot portion 210.
In this embodiment, the filter layer 220 may be used to precisely select a light wave in a small range to be passed, and reflect other unwanted light bands, for example, the red filter layer only allows red light to pass through and filters blue light and green light, so that the redundant blue light and green light cannot pass through the red filter layer, so that the filter layer 220 can filter the color light formed by exciting the quantum dot portion 210 to ensure the purity of the color light, thereby ensuring the display effect of the micro LED display module 10, and the principles of other color light filter layers 220 are the same and are not described herein.
Specifically, when the number of the light emitting portions 111 and the quantum dot portions 210 is at least three, at least three groups of the filter layers 220 can transmit blue light, red light and green light, respectively.
It can be understood that when the at least three sets of filter layers 220 can transmit blue light, red light and green light, respectively, three-color display of RGB of the micro LED display module 10 can be ensured, so as to realize the full-color display effect of the micro LED display module 10.
Further, the quantum dot sheet 200 further includes a quantum dot protection layer 230, where the quantum dot protection layer 230 is at least partially disposed on a side of the quantum dot portion 210 facing the light emitting portion 111.
In this embodiment, the quantum dot protection layer 230 is provided to separate the quantum dot portion 210 and the micro LED chip array sheet 100, so that the quantum dot portion 210 can be protected on the premise that the light transmission of the light emitting portion 111 is not affected by the quantum dot protection layer 230, so as to prevent the quantum dot portion 210 from being damaged by impurities in the external environment, and thus the display effect of the quantum dot sheet 200 is ensured. Specifically, the quantum dot protection layer 230 may be formed by using a sputtering evaporation technology to obtain an ITO transparent film, or may be formed by attaching a UV glue layer to the side of the quantum dot portion 210, for example, by spin coating, printing, dispensing, or the like, which is not limited herein.
In one embodiment, the quantum dot sheet 200 further includes a substrate layer 240, where the substrate layer 240 is disposed on a side of the quantum dot portion 210 away from the quantum dot protection layer 230.
It will be appreciated that the substrate layer 240 may be provided as an adhesion layer for the quantum dot part 210 and the filter layer 220 when the quantum dot sheet 200 is manufactured, so as to facilitate the manufacturing process of the quantum dot sheet 200.
Specifically, the quantum dot sheet 200 further includes a light-blocking portion 250, where the light-blocking portion 250 is at least partially disposed between two adjacent quantum dot portions 210.
With this arrangement, the light-blocking portion 250 can separate the space between the adjacent quantum dot portions 210, so as to avoid the occurrence of optical crosstalk between the adjacent quantum dot portions 210.
The preparation of the quantum dot sheet 200 of this embodiment may employ the following steps:
s201, a transparent substrate is provided as a substrate layer 240, black photoresist is coated on the substrate layer 240 in a spin mode, and the light isolation portion 250 is obtained through baking, photoetching and developing. Specifically, the substrate layer 240 may be made of a transparent material such as glass.
S202, spin-coating photoresist of a plurality of filter layers 220 on the basis of the substrate layer 240, and baking, alignment and development to obtain the required color light filter layer 220. Specifically, the color filter may be a red filter, a green filter, or a blue filter.
And S203, forming the quantum dot part 210 on the filter layer 220 through ink-jet printing or electrophoretic deposition.
S204, a quantum dot protection layer 230 is covered on the quantum dot portion 210. Specifically, an ITO transparent film may be obtained by using a sputtering evaporation technique as the quantum dot protection layer 230, or a UV glue layer may be obtained by, for example, spin coating, printing, dispensing, or the like, as the quantum dot protection layer 230.
Specifically, when the number of the light emitting parts 111 and the quantum dot parts 210 is at least three, at least one group of the light emitting parts 111 is used for emitting blue light, and at least two groups of the light emitting parts 111 can emit red light and green light, respectively.
It is understood that the light emitting portion 111 emitting blue light may not be provided with the quantum dot portion 210, and blue light may be displayed by the light emitting portion 111 itself, and the quantum dot portion 210 of the corresponding color may be provided at a portion where red light and green light are required to be displayed.
In an embodiment, when the number of the light emitting portions 111 and the quantum dot portions 210 is at least three, the color light emitted by at least one group of light emitting portions 111 is any one of blue color light, red color light and green color light, and at least two groups of quantum dot portions 210 are used for converting the color light into other two of blue color light, red color light and green color light.
Of course, when the light emitting portion 111 is configured to emit non-blue light, the quantum dot portion 210 may be configured as the remaining corresponding color light quantum dot portion 210, and the color of the color light of the light emitting portion 111 is not limited only.
Specifically, referring to fig. 1, the light emitting layer 110 further includes a spacer 112, where when the number of light emitting portions 111 is plural, two adjacent light emitting portions 111 may be separated by insulation through the spacer 112, and in an embodiment, the spacer 112 may be a PV layer.
Referring to fig. 3 specifically, in an embodiment, the quantum dot sheet 200 includes at least two quantum dot portions 210 and at least three optical filter layers 220, where at least two quantum dot portions 210 include a red quantum dot portion and a green quantum dot portion, at least three optical filter layers 220 include a red optical filter layer, a green optical filter layer and a blue optical filter layer, the red optical filter layer is disposed on a downstream optical path of the red quantum dot portion, the green optical filter layer is disposed on a downstream optical path of the green quantum dot portion, and an upstream optical path of the blue optical filter layer cancels the set quantum dot portion 210.
When the micro LED display module 10 of the present embodiment is used, when red light is required to be emitted, the light emitting portion 111 corresponding to the red quantum dot portion emits blue light, the blue light is all conducted to the red quantum dot portion after the light path of the blue light is adjusted by the light guiding layer 120, no light is conducted to, for example, the green quantum dot portion or the blue filter layer, the blue light excites the red quantum dot portion, then emits red light and part of other light, and then the red filter layer can filter and eliminate other light, so that only the red light is transmitted through the red light, and finally the red light is displayed through the substrate layer 240; the display principle of green light is the same as that of red light, and detailed description is omitted here; and the blue light is directly displayed through the blue filter layer after the light path of the blue light is adjusted through the light guide layer 120.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A micro LED chip array sheet, comprising:
a light emitting layer; and
the light guide layer is arranged on a light path of the light emitting layer, light rays emitted by the light emitting layer are refracted through the light guide layer to form first light rays and second light rays, the first light rays are conducted in a direction close to an optical axis of the light emitting layer, and the second light rays are conducted in a direction far away from the optical axis; at least part of the light guide layer is arranged on the light path of the second light ray, and makes the second light ray reflect to the direction of the optical axis for conduction.
2. The micro LED chip array sheet according to claim 1, wherein the light guiding layer includes a base portion and a plurality of light guiding portions, the plurality of light guiding portions are uniformly provided at one side of the base portion, the light rays are refracted through the light guiding portions, and an outer wall of the light guiding portions is used for reflecting the second light rays;
and/or the refractive index of the light guide portion is in the range of 2-3.
3. The micro LED chip array sheet according to claim 2, wherein the light guide portion is formed by photolithography and etching;
and/or the cross section of the light guiding portion in a direction parallel to the optical axis includes a triangle, and the tip of the light guiding portion is convex in a direction away from the base portion.
4. The utility model provides a miniature LED display module assembly which characterized in that includes:
a light emitting layer including a plurality of light emitting parts;
the quantum dot sheet comprises a plurality of quantum dot parts, wherein the quantum dot parts are arranged on the light path of the light-emitting part and are in one-to-one correspondence with the light-emitting part;
the light guide layer is arranged between the light emitting layer and the quantum dot sheet, light rays emitted by the light emitting layer are refracted through the light guide layer to form first light rays and second light rays, the first light rays are conducted towards the direction of the quantum dot parts corresponding to the light emitting parts, and the second light rays are conducted towards the direction away from the quantum dot parts corresponding to the light emitting parts; at least part of the light guide layer is arranged on the light path of the second light ray, and makes the second light ray reflect to the direction of the quantum dot part corresponding to the light emitting part for conduction.
5. The micro LED display module according to claim 4, wherein the quantum dot sheet further comprises a filter layer, the filter layer is disposed on a side of the quantum dot portion corresponding to the light emitting portion away from the light emitting portion, and the filter layer is capable of transmitting the same light as the color light of the quantum dot portion.
6. The micro LED display module of claim 5, wherein the number of the light emitting portions and the quantum dot portions is at least three, wherein at least three groups of the filter layers can transmit blue light, red light and green light, respectively.
7. The micro LED display module of claim 4, wherein the quantum dot sheet further comprises a quantum dot protection layer, the quantum dot protection layer being at least partially disposed on a side of the quantum dot portion facing the light emitting portion.
8. The micro LED display module of claim 7, wherein the quantum dot sheet further comprises a substrate layer disposed on a side of the quantum dot portion away from the quantum dot protection layer.
9. The micro LED display module of claim 4, wherein the quantum dot sheet further comprises a light blocking portion at least partially disposed between two adjacent quantum dot portions.
10. The micro LED display module according to claim 4, wherein when the number of the light emitting parts and the quantum dot parts is at least three, at least one group of the light emitting parts is used for emitting blue light, and the other at least two groups of the light emitting parts can emit red light and green light respectively;
and/or when the number of the light emitting parts and the quantum dot parts is at least three, wherein the color light emitted by at least one group of the light emitting parts is any one of blue color light, red color light and green color light, and at least two groups of the quantum dot parts are used for converting the color light into other two of the blue color light, the red color light and the green color light.
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| CN114724470A (en) | 2022-07-08 |
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