CN114265141A - Light guide plate, backlight module and display device - Google Patents
Light guide plate, backlight module and display device Download PDFInfo
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- CN114265141A CN114265141A CN202111589783.8A CN202111589783A CN114265141A CN 114265141 A CN114265141 A CN 114265141A CN 202111589783 A CN202111589783 A CN 202111589783A CN 114265141 A CN114265141 A CN 114265141A
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Abstract
The application provides a light guide plate, a backlight module and a display device, wherein the light guide plate comprises a transparent light guide layer; the transparent shell is arranged on one side of the transparent light guide layer, the orthographic projection area of the transparent shell on the transparent light guide layer is superposed with the area of the transparent light guide layer, and a cavity is arranged inside the transparent shell; and the quantum dot material is filled in the cavity. The light guide plate of this application is in one side on transparent leaded light layer sets up transparent casing, transparent casing's inside is equipped with the cavity, the quantum dot material fill in the cavity, play the guard action to the quantum dot material through transparent casing to reduce external environment and to the influence of quantum dot, avoid the quantum dot inefficacy, and then be favorable to improving the life of light guide plate.
Description
Technical Field
The application relates to the technical field of display devices, in particular to a light guide plate, a backlight module and a display device.
Background
The backlight module can be used for providing a surface light source for the display panel. The backlight module generally includes a light source and a light guide plate, and light emitted from the light source enters the light incident surface of the light guide plate and enters the light guide plate, and is diffused by the light guide plate and then exits from the light exiting surface of the light guide plate, thereby providing a surface light source for the liquid crystal display panel.
The light guide plate is also provided with a quantum dot film, and the blue light is used for exciting the quantum dot film to generate mixed white light, so that the color gamut of the display panel is wider. Since oxygen and moisture molecules may cause photo-oxidation and photo-corrosion on the surface of the quantum dots when the quantum dots are exposed to air and moisture (e.g., water). Once the quantum dots react with oxygen and moisture, new defects may be created on the surface of the quantum dots. Such defects may result in reduced luminescence of the quantum dots.
Quantum dot films generally include two base films and a quantum dot layer disposed between the two base films. Because the influence of water vapor and oxygen on the quantum dots is large, the quantum dot film is generally cut by laser instead of a cutting die. The laser cutting can sinter the edge area of the quantum dot film, so that water vapor and oxygen are prevented from entering, but the quantum dots positioned in the edge area are invalid, and a blue edge appears at the edge of the display area of the backlight module. The "blue edge" not only affects the display effect of the liquid crystal display device, but also causes eye fatigue and thus causes a reduction in eyesight.
Disclosure of Invention
The application provides a light guide plate, backlight module and display device to solve the problem that the quantum dot of light guide plate became invalid easily.
In one aspect, the present application provides a light guide plate, comprising:
a transparent light guide layer;
the transparent shell is arranged on one side of the transparent light guide layer, the orthographic projection area of the transparent shell on the transparent light guide layer is superposed with the area of the transparent light guide layer, and a cavity is arranged inside the transparent shell;
and the quantum dot material is filled in the cavity.
In one possible implementation manner of the present application, an injection hole is disposed on at least one side surface of the transparent shell, and the quantum dot material is injected into the cavity through the injection hole;
the transparent casing further comprises a sealing member fitted to the injection hole.
In a possible implementation manner of the present application, the cavity includes a plurality of sub-cavities, and two adjacent sub-cavities are disposed at intervals in the transparent shell.
In this application a possible implementation, be equipped with a plurality of baffles in the cavity, the baffle will the cavity divides into a plurality ofly the cavity, be provided with the through-hole on the baffle, adjacent two the cavity passes through the through-hole communicates each other.
In this application a possible implementation, transparent casing is in orthographic projection area on the transparent leaded light layer with the area coincidence on leaded light layer, transparent casing with transparent leaded light layer bonds each other or integrated into one piece sets up.
In one possible implementation manner of the present application, the thickness of the transparent light guide layer is less than or equal to 0.4mm, and the thickness of the transparent shell is less than or equal to 0.22 mm.
In a possible implementation manner of the present application, the transparent light guiding layer includes a light emitting surface and a reflecting surface which are opposite to each other, the transparent shell is disposed on the light emitting surface, and the reflecting surface is provided with a plurality of light guiding dots
In one possible implementation manner of the present application, the transparent light guide layer is a flat plate structure or a wedge-shaped structure.
On the other hand, the application also provides a backlight module which comprises the light guide plate.
On the other hand, the application also provides a display device, which comprises a display panel and a backlight module, wherein the backlight module is the backlight module.
The application provides a pair of light guide plate, backlight unit and display device, through one side on transparent leaded light layer sets up transparent casing, transparent casing's inside is equipped with the cavity, quantum dot material fill in the cavity, play the guard action to the quantum dot material through transparent casing to reduce external environment and to the influence of quantum dot, avoid the quantum dot to become invalid, and then be favorable to improving the life of light guide plate.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
Fig. 2 is a schematic cross-sectional structure diagram of a light guide plate according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a touch substrate according to an embodiment of the present disclosure.
Fig. 4 is a schematic perspective view of a light guide plate according to an embodiment of the present application.
Fig. 5 is a schematic cross-sectional view illustrating a structure of an injection hole and a sealing member of a light guide plate according to an embodiment of the present disclosure.
Fig. 6 is a schematic cross-sectional view illustrating an injection hole and a sealing member of a light guide plate according to still another embodiment.
Fig. 7 is a schematic perspective view illustrating a transparent light guiding layer of a light guiding plate according to yet another embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the features of the terms "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. It is to be understood that, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are used broadly and can refer to, for example, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The embodiment of the application provides a light guide plate, a backlight module and a display device, which are respectively described in detail below.
As shown in fig. 1, an embodiment of the present application firstly provides a backlight module including the above light guide plate. Specifically, the backlight module of the embodiment of the present application sequentially includes, from bottom to top, a back plate 200, an excitation light source 300 located on a side of the back plate 200, a reflective sheet 400, a light guide plate 100, an optical film 500, a rubber frame 600, and a liquid crystal panel 700 disposed on the rubber frame 600. Wherein, the excitation light source 300 can adopt an ultraviolet light source with a wavelength range of 280nm to 400nm, or a blue light source with a central wavelength of 430nm to 480nm and a half-peak width of 15nm to 55 nm; including but not limited to mercury lamps, LEDs, laser diodes, OLEDs, etc.
Referring to fig. 2-7, an embodiment of the present invention first provides a light guide plate 100, which includes a transparent light guide layer 10, a transparent casing 20 and a quantum dot material 30.
And a transparent light guide layer 10 for changing the point light source of the excitation light source 300 into a surface light source. The transparent light guide layer 10 has a plate-shaped structure, and the transparent light guide layer 10 may be made of one or more of Polyethylene (PE), polypropylene (PP), polyethylene naphthalate (PEN), Polycarbonate (PC), polymethyl acrylate (PMA), and polymethyl methacrylate (PMMA).
The quantum dot material 30 is filled in the cavity 201. Through filling the quantum dot material 30 in the cavity 201, utilize the excitation light source 300 to pass through transparent light guide layer 10 and reentrant transparent shell 20, the excitation quantum dot material produces mixed white light to can avoid external environmental factor to cause the influence to the quantum dot under transparent shell 20's protection when can making the quantum dot material 30 normally luminous, thereby can avoid the problem that quantum dot material 30 became invalid. In addition, compare with quantum dot doping in light guide plate 100, because receive the influence of light guide plate 100 material, can cause the quantum dot material 30 of doping in light guide plate 100 to the uneven problem of distribution probably appears to can lead to bright dark uneven phenomenon, and through filling quantum dot material 30 in the cavity 201 of transparent casing 20, thereby make the distribution of quantum dot material 30 more even, thereby guarantee the homogeneity of light-emitting of light guide plate 100, be favorable to improving holistic display effect.
The light guide plate 100 of the embodiment of the application sets up the transparent casing 20 through the one side at the transparent leaded light layer 10, and the inside of transparent casing 20 is equipped with cavity 201, and quantum dot material 30 is filled in cavity 201, plays the guard action to quantum dot material 30 through transparent casing 20 to reduce the influence of external environment to quantum dot material 30, avoid the quantum dot to become invalid, and then be favorable to improving the life of light guide plate 100.
In some embodiments, as shown in fig. 3 and 4, the transparent casing 20 is further provided with an injection hole 202 and a sealing member 40.
Be provided with injection hole 202 on at least one side of transparent casing 20, quantum dot material 30 passes through injection hole 202 and injects into cavity 201 to the realization fills in cavity 201 with quantum dot material 30, and then is favorable to guaranteeing the homogeneity of light guide plate 100 light-emitting, is favorable to improving holistic display effect. Here, the injection hole 202 may be a circular hole, a square hole, a polygonal hole, or the like, and the shape of the injection hole 202 is not particularly limited. The number of the injection holes 202 may be multiple, one injection hole 202 may be provided on each side surface of the transparent shell 20, or multiple injection holes 202 may be provided on each transparent side surface, and the arrangement of the multiple injection holes 202 may improve the injection efficiency of the quantum dot material 30.
The transparent casing 20 further includes a sealing member 40, and the sealing member 40 is fitted into the injection hole 202. Through sealing member 40 and the cooperation of filling hole 202 in order to realize sealing quantum dot material 30 in transparent housing 20, thereby can avoid the quantum dot wherein, sealing member 40 can be the plug or glue the encapsulated layer, the plug or glue the encapsulated layer and be used for being injected into cavity 201 with the quantum dot after, realize that the sealed of filling hole 202 uses sealing member 40 as gluing the encapsulated layer as the example, when the quantity of filling hole 202 is a plurality of, glue the encapsulated layer and can only set up in filling hole 202 department, also can set up the whole face of gluing the encapsulated layer and coat in the side that is provided with a plurality of filling holes 202, thereby be favorable to simplifying technology.
Further, as shown in fig. 5, the injection hole 202 may be a countersunk hole, and correspondingly, the sealing member 40 may be a sealing member 40 with a cross section being "T", for example, a rubber plug with a cross section being "T", and by setting the injection hole 202 as the countersunk hole, a surface of the sealing member 40 facing away from the cavity 201 is flush with a side surface of the transparent casing 20, so that when the aesthetic degree of the light guide plate 100 is ensured and the subsequent assembly is facilitated, the backlight module is compact in structure.
It should be noted that, the light guide plate 100 has the light incident surface 13, the light incident surface 13 is one surface of the light guide plate 100, the light incident surface 13 is disposed toward the excitation light source 300 of the backlight module, the light generated by the excitation light source 300 enters the light guide plate 100 from the light incident surface 13, the injection hole 202 and the sealing member 40 are not disposed on the light incident surface 13, that is, the injection hole 202 and the sealing member 40 are only disposed on the side surface of the transparent casing 20 away from the light incident surface 13, because the light incident surface 13 is closest to the excitation light source 300, the illumination intensity of the excitation light source 300 is maximum, and the transparent casing 20 is made of a transparent material, if the injection hole 202 and the sealing member 40 are disposed on the surface, due to the difference of refractive indexes, the light is easily uneven when the light enters the transparent light guide layer 10 through the transparent casing 20 having the injection hole 202, and finally causes uneven light emission of the light guide plate 100, and only the injection hole 202 and the sealing member 40 are disposed on the other side surfaces of the transparent casing 20 away from the light incident surface 13, light is owing to get into effects such as light guide plate 100 through diffuse reflection, and illumination intensity can reduce to a certain extent to even through being equipped with the transparent housing 20 of filling hole 202 during light-emitting, still can keep better light-emitting homogeneity, consequently, only set up filling hole 202 and sealing member 40 when keeping away from other sides of this income plain noodles 13 in transparent housing 20, thereby be favorable to guaranteeing the light-emitting homogeneity of light guide plate 100, be favorable to improving holistic display effect.
In some embodiments, as shown in fig. 6, the chamber 201 includes a plurality of sub-chambers 211, and two adjacent sub-chambers 211 are spaced apart in the transparent housing 20. The shape of the cavity 201 may be a polygon, such as a triangle, a rectangle, or a regular hexagon, and the shape of the cavity 201 is not limited herein. Further, the plurality of sub-cavities 211 may have the same shape or different shapes, for example, a portion is rectangular, a portion is triangular, etc. Furthermore, the number of the sub-cavities 211 may be two, three, four or even more, and the number of the cavities 201 is not limited herein. Taking the case that each sub-cavity 211 is rectangular, the sub-cavities 211 may be distributed in a matrix, for example, in a "2 × 2" matrix, or in a "3 × 3" matrix, etc. Compared with the structure of a single cavity 201, the cavity 201 is set into a plurality of sub-cavities 211, so that the quantum dot materials 30 can be more uniformly distributed in the respective cavities 201, and light emitted from the light guide plate 100 can be more uniform.
In some embodiments, a plurality of partition boards 50 are disposed in the cavity 201, the partition boards 50 divide the cavity 201 into a plurality of sub-cavities 211, through holes (not shown) are disposed on the partition boards 50, and two adjacent sub-cavities 211 are communicated with each other through the through holes. When the sub-cavities 211 are rectangular structures distributed in a 3 × 3 matrix, at least one of the four partition boards 50 for enclosing the 5 th sub-cavity 211 is provided with a through hole, so that the quantum dot material 30 can enter the 5 th sub-cavity 211 from the injection hole 202 via other sub-cavities 211 adjacent to the injection hole, and therefore the quantum dot material 30 can be uniformly filled in each cavity 201, and the light guide plate 100 can uniformly emit light.
In some embodiments, the orthographic projection area of the transparent shell 20 on the transparent light guide layer 10 coincides with the area of the light guide layer 10, and the orthographic projection area of the transparent shell 20 on the transparent light guide layer 10 coincides with the area of the transparent light guide layer 10, so that the light emitted from the transparent light guide layer 10 can pass through the quantum dot material 30, and the light guide plate 100 can realize the whole light emitting.
The transparent shell 20 and the transparent light guide layer 10 are bonded to each other or integrally formed. Exemplarily, when the connection mode of the transparent shell 20 and the transparent light guide layer 10 is bonding, the transparent shell 20 and the transparent light guide layer 10 can be connected by using optical cement, and the optical cement can be coated on the whole surface of the transparent shell 20 or the transparent light guide layer 10, or coated on the edge of the transparent shell 20 or the transparent light guide layer 10, which is simple in structure. When the connection mode of transparent casing 20 and transparent leaded light layer 10 is integrated into one piece, transparent casing 20 and transparent leaded light layer 10 can adopt injection moulding to can guarantee the structural stability between transparent casing 20 and the transparent leaded light layer 10, also be favorable to guaranteeing the homogeneity of light guide plate 100 light-emitting simultaneously, be favorable to improving holistic display effect.
In some embodiments, the thickness of transparent light guiding layer 10 is less than or equal to 0.4mm and the thickness of transparent shell 20 is less than or equal to 0.22 mm. The thickness of the transparent light guide layer 10 and the thickness of the transparent shell 20 are controlled in a small range, so that the thickness of the backlight module can be reduced when the light guide plate 100 is assembled to form the backlight module in the following process, and the light weight and the thinning can be realized.
In some embodiments, the transparent light guiding layer 10 includes an opposite light emitting surface 11 and a reflecting surface 12, the transparent shell 20 is disposed on the light emitting surface 11, and the reflecting surface 12 is disposed with a plurality of light guiding dots 60. The light guide plate 100 accomplishes the light adjustment by destroying the total reflection using the light guide dots 60. The light guide mesh points 60 can scatter light, so that the light scattering capability of the light guide plate 100 on the light can be effectively improved, namely, the light utilization rate is improved, and the surface light source formed by emitting light from the light guide plate 100 tends to be more uniform and has higher brightness. Since the light guide dots 60 are located inside the transparent light guide layer 10, the light guide dots 60 of the light guide plate 100 and the reflective sheet 400 of the backlight module do not rub against each other, thereby prolonging the service life of the backlight module. The light guide dots 60 can be made by chemical etching, laser direct writing, and photolithography, both of which can be printed or non-printed. The light guide dots 60 may be raised structures or depressed structures. The light guide dots 60 are uniformly or non-uniformly distributed, and may be in various shapes such as rectangular, circular, V-shaped, hexagonal, and pyramidal shapes, and the light guide dots 60 may be arranged concentrically or in an array, and the like, which is not limited herein.
In some embodiments, as shown in FIG. 7, the transparent light guiding layer 10 is a flat plate structure or a wedge-shaped structure. In the embodiment, the light guide plate 100 is taken as an example of a wedge-shaped structure, and the thickest end of the wedge-shaped structure is close to the excitation light source 300 and is used for receiving light emitted by the excitation light source 300 and guiding the light into the transparent light guide layer 10; the light emitting surface 11 and the light incident surface 13 are opposite to each other, the light incident surface 13 is an inclined surface, a part of light entering the transparent light guiding layer 10 is directly guided out through the light emitting surface 11, and the other part of light is finally emitted out from the light emitting surface 11 after being reflected by the reflecting surface 12.
Note that, this is because. Since the backlight module has the light guide plate, the backlight module has the same beneficial effects as the light guide plate, and the description of the embodiment is omitted.
In order to better implement the backlight module of the present application, the present application further provides a display device, which includes a display panel and a backlight module, wherein the backlight module is the above-mentioned backlight module. The display panel may be a liquid crystal display panel or a quantum dot led (qled) display panel, and correspondingly, the display device may be a liquid crystal display device or a quantum dot led (qled) display device. Since the display device has the display panel, all the same advantages are achieved, and the description of the embodiment is omitted. The embodiment of the application is not particularly limited to the application of the display device, and the display device can be any product or component with a display function, such as a television, a notebook computer, a tablet computer, a wearable display device (such as an intelligent bracelet, an intelligent watch and the like), a mobile phone, a virtual reality device, an augmented reality device, a vehicle-mounted display, an advertising lamp box and the like.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing method embodiment, which is not described herein again.
The light guide plate 100, the backlight module and the display device provided in the embodiment of the present application are described in detail above, and a specific example is applied to explain the principle and the implementation manner of the embodiment of the present application, and the description of the embodiment is only used to help understanding the technical scheme and the core idea of the embodiment of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A light guide plate, comprising:
a transparent light guide layer;
the transparent shell is arranged on one side of the transparent light guide layer, and a cavity is arranged inside the transparent shell;
and the quantum dot material is filled in the cavity.
2. The light guide plate according to claim 1, wherein an injection hole is provided on at least one side surface of the transparent case, and the quantum dot material is injected into the cavity through the injection hole;
the transparent casing further comprises a sealing member fitted to the injection hole.
3. The light guide plate according to claim 1, wherein the cavity comprises a plurality of sub-cavities, and two adjacent sub-cavities are arranged at intervals in the transparent shell.
4. The light guide plate according to claim 3, wherein a plurality of partition plates are arranged in the cavity, the partition plates divide the cavity into a plurality of sub-cavities, through holes are formed in the partition plates, and two adjacent sub-cavities are communicated with each other through the through holes.
5. The light guide plate according to claim 1, wherein an orthographic area of the transparent shell on the transparent light guide layer coincides with an area of the light guide layer, and the transparent shell and the transparent light guide layer are bonded or integrally formed with each other.
6. The light guide plate according to claim 1, wherein the thickness of the transparent light guide layer is less than or equal to 0.4mm, and the thickness of the transparent housing is less than or equal to 0.22 mm.
7. The light guide plate according to any one of claims 1 to 6, wherein the transparent light guide layer comprises a light emitting surface and a reflecting surface opposite to each other, the transparent shell is disposed on the light emitting surface, and the reflecting surface is provided with a plurality of light guide dots.
8. The light guide plate according to any one of claims 1 to 6, wherein the transparent light guide layer has a flat plate structure or a wedge structure.
9. A backlight module comprising the light guide plate according to any one of claims 1 to 8.
10. A display device comprising a display panel and a backlight module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111589783.8A CN114265141B (en) | 2021-12-23 | 2021-12-23 | Light guide plate, backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111589783.8A CN114265141B (en) | 2021-12-23 | 2021-12-23 | Light guide plate, backlight module and display device |
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| CN114265141A true CN114265141A (en) | 2022-04-01 |
| CN114265141B CN114265141B (en) | 2023-10-03 |
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| CN114265141B (en) | 2023-10-03 |
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