CN116540452A

CN116540452A - Backlight module and display device

Info

Publication number: CN116540452A
Application number: CN202310634306.1A
Authority: CN
Inventors: 郭秋月; 叶利丹
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-08-04

Abstract

The application discloses a backlight module and a display device, wherein the backlight module comprises a lamp panel, a plurality of light absorption and reflection structures and a diffusion plate, and a plurality of lamp beads are arranged on the lamp panel in an array manner; the light absorption and reflection structures are arranged on the lamp panel and are arranged at intervals with the lamp beads, and the light absorption and reflection structures are used for absorbing light rays emitted by the lamp beads and reflecting blue light rays; the diffusion plate is arranged on one side of the lamp beads, which is away from the lamp panel, and is used for homogenizing light rays emitted by the lamp beads; wherein, at least one side of each lamp bead is provided with the light absorption and reflection structure; the problem of yellowing of the display panel is improved under the condition of not affecting the transmittance through the scheme.

Description

Backlight module and display device

Technical Field

The application relates to the technical field of display, in particular to a backlight module and a display device.

Background

Currently, a liquid crystal display device (Liquid Crystal Display, abbreviated as LCD) is increasingly used because of its advantages of low power consumption, miniaturization, light weight, and the like. The liquid crystal display device includes an upper substrate, a lower substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate. The thickness of the liquid crystal cell (also referred to as the thickness of the liquid crystal layer) determines the optical path difference and thus the optical properties of the liquid crystal display panel. The liquid crystal has flowability, so that the thickness of the liquid crystal box is not fixed, on one hand, in the liquid crystal dripping process, the liquid crystal can be diffused to the periphery, so that the liquid crystal in the peripheral area is accumulated more than that in the central area, and the thickness of the liquid crystal box in the peripheral display area is uneven; on the other hand, in the process of manufacturing the liquid crystal display panel, the liquid crystal display panel is distorted, so that the thickness of the liquid crystal cells in the peripheral display area is uneven, and the thickness of the cells in the peripheral display area is uneven, so that the optical properties of the peripheral display area are different from those of the middle display area, that is, the transmittance of yellow light in the peripheral display area is increased, and the problem of yellowing of the peripheral display area occurs when the liquid crystal display panel is displayed.

In the prior art, methods of changing color sets, reducing box thickness, adjusting white balance and the like are generally adopted, but the problems of reduced transmittance exist in the methods. Accordingly, there is a need in the art for a solution to the problem of yellowing of display panels without affecting the transmittance.

Disclosure of Invention

The present disclosure provides a backlight module and a display device to improve yellowing of a display panel without affecting transmittance.

The application discloses a backlight module, which comprises a lamp panel, a plurality of light absorption and reflection structures and a diffusion plate, wherein a plurality of lamp beads are arranged on the lamp panel in an array manner; the light absorption and reflection structures are arranged on the lamp panel and are arranged at intervals with the lamp beads, and the light absorption and reflection structures are used for absorbing light rays emitted by the lamp beads and reflecting blue light rays; the diffusion plate is arranged on one side of the lamp beads, which is away from the lamp panel, and is used for homogenizing light rays emitted by the lamp beads; wherein, at least one side of each lamp pearl is provided with the light absorption reflection structure.

Optionally, the light absorbing and reflecting structure comprises a magnesium layer, an amorphous silicon layer and a silicon dioxide layer; the magnesium layer is arranged on the silicon dioxide layer, the silicon dioxide layer is arranged on the amorphous silicon layer, and one side, far away from the silicon dioxide layer, of the amorphous silicon layer is close to the lamp panel.

Optionally, the thickness of the amorphous silicon layer is 25nm-40nm, the thickness of the silicon dioxide layer is 185nm-200nm, and the thickness of the magnesium layer is 160nm.

Optionally, the light absorbing reflective structure includes an amorphous silicon layer and a silicon dioxide layer; the silicon dioxide layer is arranged on the amorphous silicon layer, and one side of the amorphous silicon layer, which is far away from the silicon dioxide layer, is close to the lamp panel; the thickness of the amorphous silicon layer is 10nm-30nm, and the thickness of the silicon dioxide layer is 140nm-160nm.

Optionally, four sides of each lamp bead are respectively provided with one light absorption and reflection structure; the backlight module comprises a central area and a peripheral area, wherein the peripheral area surrounds the central area, and the density of the light absorption and reflection structures positioned in the central area is smaller than that of the light absorption and reflection structures positioned in the peripheral area.

Optionally, the backlight module further includes a side plate, at least one side plate is disposed on the edge of the lamp panel, and an included angle is formed between the side plate and the lamp panel, and the included angle is between 90 degrees and 135 degrees; the side plate is provided with a light absorption and reflection film layer near one side of the diffusion plate, and the light absorption and reflection film layer is used for absorbing light rays emitted by the lamp beads and reflecting blue light rays.

Optionally, the light absorbing and reflecting film layer is formed by arranging a plurality of light absorbing and reflecting structure arrays, and gaps are arranged between adjacent light absorbing and reflecting structures; in the first direction, the area of the light absorbing and reflecting structure gradually becomes larger; the first direction is the extending direction of the side plate from one side close to the lamp panel to one side far away from the lamp panel.

Optionally, the light absorbing and reflecting film layer is formed by arranging a plurality of light absorbing and reflecting structure arrays, and gaps are arranged between adjacent light absorbing and reflecting structures; in the first direction, the spacing between adjacent light absorbing and reflecting structures becomes smaller or the density of a plurality of the light absorbing and reflecting structures increases; the first direction is the extending direction of the side plate from one side close to the lamp panel to one side far away from the lamp panel.

Optionally, the backlight module further includes a first driving structure, where the first driving structure is configured to drive the light absorbing and reflecting film layer to move along the first direction relative to the side plate, so that a total area of the light absorbing and reflecting structure on the side plate is changed.

The application also discloses a display device, which comprises a display panel and the backlight module.

According to the direct type backlight module, the light absorption and reflection structure is arranged on the periphery of the lamp beads, the light with partial wavelength emitted from the lamp beads to the direction of the lamp panel is absorbed through the light absorption and reflection structure, and then blue light is reflected, so that the proportion of the blue light in the display panel is enhanced, and the problem of yellowing of panel display is solved. In this scheme, because light absorption reflection configuration sets up on the lamp plate, and is located the lamp pearl all around, do not set up in display panel's each rete, loss when can effectively reduce light and pass more retes can not influence display panel's transmissivity. More importantly, the blue light can be reflected by absorbing the redundant light emitted by the lamp beads, so that the display effect of the display panel is enhanced, and the problem of yellowing of the display panel is solved under the condition that the transmittance is not affected.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:

FIG. 1 is a schematic view of a display panel of the present application;

FIG. 2 is a schematic view of a first light absorbing reflective structure of the present application;

FIG. 3 is a schematic view of a second light absorbing reflective structure of the present application;

FIG. 4 is a schematic view of a first lamp panel according to the present application;

FIG. 5 is a schematic view of a second lamp panel according to the present application;

FIG. 6 is a schematic view of a third lamp panel according to the present application;

FIG. 7 is a schematic view of a fourth lamp panel according to the present application;

fig. 8 is a schematic diagram of a backlight module according to a second embodiment of the present application;

FIG. 9 is a schematic view of a side panel of a second embodiment of the present application;

fig. 10 is a schematic view of a backlight module according to a third embodiment of the present application;

FIG. 11 is a schematic view of a second side panel of a third embodiment of the present application;

fig. 12 is a schematic view of a display device of the present application.

100, a backlight module; 101. a central region; 102. a peripheral region; 103 edge regions; 110. a lamp panel; 111. a side plate; 120. a lamp bead; 130. a light absorbing reflective structure; 131. a magnesium layer; 132. an amorphous silicon layer; 133. a silicon dioxide layer; 134. a light absorbing reflective film layer; 140. a diffusion plate; 150. a reflection sheet; 151. a hollowed-out part; 160. a first driving structure; 200. a display device; 210. a display panel; x, first direction.

Detailed Description

It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. In addition, terms of the azimuth or positional relationship indicated by "upper", "lower", "left", "right", "vertical", "horizontal", etc., are described based on the azimuth or relative positional relationship shown in the drawings, and are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The present application is described in detail below with reference to the attached drawings and alternative embodiments.

Embodiment one:

fig. 1 is a schematic view of a display panel of the present application, referring to fig. 1, the present application discloses a backlight module 100, which includes a lamp panel 110, a plurality of light absorbing and reflecting structures 130, and a diffusion plate 140, wherein a plurality of lamp beads 120 are arranged on the lamp panel 110 in an array manner; the light absorbing and reflecting structures 130 are disposed on the light panel 110 and spaced from the light beads 120, and the light absorbing and reflecting structures 130 are used for absorbing light emitted by the light beads 120 and reflecting blue light; the diffusion plate 140 is disposed at a side of the lamp beads 120 away from the lamp panel 110, for homogenizing the light emitted from the lamp beads 120; wherein at least one side of each of the lamp beads 120 is provided with the light absorbing and reflecting structure 130.

In the direct type backlight module 100, the light absorption and reflection structure 130 is arranged around the lamp beads 120, and the light with partial wavelength emitted from the lamp beads 120 to the direction of the lamp panel 110 is absorbed by the light absorption and reflection structure 130 and then reflected to emit blue light, so that the proportion of the blue light in the display panel is enhanced, and the problem of yellowing of the panel display is solved. In this scheme, because the light absorption and reflection structure 130 is disposed on the lamp panel 110 and is located around the lamp beads 120, it is not disposed in each film layer of the display panel, and thus the loss of light passing through more film layers can be effectively reduced, and the transmittance of the display panel is not affected. More importantly, the extra light emitted by the lamp beads 120 can be absorbed to reflect blue light, so that the display effect of the display panel is enhanced, and the yellowing problem of the display panel is improved under the condition that the transmittance is not affected.

It is understood that the backlight module 100 in the present embodiment is a direct type backlight module 100, the plurality of light beads 120 are arranged on the light panel 110 in an array, and the light panel 110 is generally arranged on the back plate. For example, in micro LED display panels, the light bar is disposed on the back plate, and the same applies to the present application. In the direct type backlight module 100 or micro LED, light from the light beads 120 toward the diffusion plate 140 is mainly utilized, and in some exemplary technologies, more reflective sheets may be disposed to increase the utilization rate of the light emitted by the light beads 120 as much as possible. For the present application, the excessive light of the lamp beads 120 is mainly utilized, and the light is absorbed by the light absorbing and reflecting structure 130 and then reflected to the blue light, so as to enhance the blue light of the backlight module 100, and further prevent the display panel from yellowing. Specifically, the backlight module 100 further includes a back plate, an optical film, and the like, where the back plate is disposed below the lamp panel 110, and the optical film is disposed above the diffusion plate 140.

Referring to fig. 2, fig. 2 is a schematic view of a first light absorption and reflection structure of the present application, where a light absorption and reflection structure 130 is a multi-film layer-by-layer structure, and the light absorption and reflection structure 130 includes a magnesium layer 131, an amorphous silicon layer 132, and a silicon dioxide layer 133; the magnesium layer 131 is disposed on the silicon dioxide layer 133, the silicon dioxide layer 133 is disposed on the amorphous silicon layer 132, and a side of the amorphous silicon layer 132 away from the silicon dioxide layer 133 is close to the lamp panel 110.

In this embodiment, the light-absorbing reflective structure 130 is formed of magnesium, amorphous silicon (a-si) and silicon dioxide, and each light-absorbing reflective structure 130 is formed by stacking the three materials. The light absorbing and reflecting structure 130 is a film layer capable of absorbing light and reflecting blue light, has spectrum selectivity, and can absorb light of other colors almost uniformly to reflect blue light. The amount of reflected blue light is adjusted by changing the area, number, density, thickness, etc. of the light absorbing reflective structures 130 to achieve the desired blue light reflection.

The light absorbing and reflecting structure 130 not only can absorb light with partial wavelength, but also can adjust light meeting preset requirements, such as blue light, red light, green light, and the like, according to selection. Mainly in the control of the thickness of the amorphous silicon layer 132, tuned absorption resonance can be achieved. In different combinations of thicknesses of the amorphous silicon layer 132 and the silicon oxide layer 133, reflection of different colors, i.e., blue light, red light, green light, etc., can be achieved.

In this application, the thicknesses of the film layers of the light absorbing and reflecting structure 130 are specifically as follows: the thickness of the amorphous silicon layer 132 is 25nm to 40nm, the thickness of the silicon dioxide layer 133 is 185nm to 200nm, and the thickness of the magnesium layer 131 is 160nm. Wherein the thickness ranges include the end points, respectively, and the thickness of the magnesium layer 131 may be within ±10 nm. In this embodiment, the light absorbing and reflecting structure 130 can absorb light of other colors and reflect blue light. The yellowing problem of the display panel can be generally solved by enhancing blue light or filtering yellow light, and in the exemplary technology, a yellow light filtering structure is disposed above the lamp panel 110 or on one side of the light emitting surface of the display panel, so that the yellowing problem caused by excessive yellow light and insufficient blue light can be improved, but the yellow light filtering structure also absorbs part of light, so that more light is lost, and the light loss becomes larger. In this application, through setting up light absorption reflection configuration 130 on lamp plate 110, be located same layer with lamp pearl 120 for light need not to pass light absorption reflection configuration 130, can not disturb the luminous of lamp pearl 120, can also utilize the unnecessary light of lamp pearl 120 moreover, forms the blue light, promotes display panel's display effect.

Referring to fig. 3, fig. 3 is a schematic view of a second light absorbing and reflecting structure of the present application, and in another implementation manner of this embodiment, the magnesium layer 131 in the light absorbing and reflecting structure 130 may be further removed, which specifically includes: the light absorbing reflective structure 130 includes an amorphous silicon layer 132 and a silicon dioxide layer 133; the silicon dioxide layer 133 is disposed on the amorphous silicon layer 132, one side of the amorphous silicon layer 132 away from the silicon dioxide layer 133 is close to the lamp panel 110, the thickness of the amorphous silicon layer 132 is 10nm-30nm, and the thickness of the silicon dioxide layer 133 is 140nm-160nm.

After the magnesium layer 131 is removed, the light absorbing and reflecting structure 130 has the same function as the light absorbing and reflecting structure 130 formed by the three layers of materials, and only has differences in thickness and reflection efficiency, so that the problem of yellow display of the display panel can be improved to a certain extent, the display effect of the panel is improved to meet the requirements of clients, the performance and quality of the display panel are improved, and the experience and satisfaction of users are improved.

Specifically, a reflective layer is provided on the lamp panel 110, and a support between the lamp panel 110 and the diffusion plate 140 may use a strut or the like. The cavity between the reflective layer and the diffusion plate 140 is called a light mixing cavity. Because the lamp beads 120 are arranged in an array, the emitted light sources are punctiform, and in order to obtain uniform brightness, the height of the light mixing cavity is related to the arrangement space of the lamp beads 120, so that the space of the lamp beads 120 needs to be designed according to practical situations, and the positions of the light absorption and reflection structures 130 are set on the basis of the design of the lamp beads 120.

Referring to fig. 4, fig. 4 is a schematic view of a first lamp panel of the present application, in an embodiment, a light-absorbing reflective structure 130 may be disposed at a middle position between adjacent lamp beads 120, that is, the light-absorbing reflective structure 130 disposed in an array manner similar to the array manner of the lamp beads 120. In this scheme, firstly, intermediate position between the adjacent lamp pearl 120 belongs to the light convergence point of two lamp pearls 120, and the light intensity of adjacent lamp pearl 120 is comparatively unanimous in this position, can receive the light that two lamp pearls 120 take place, secondly, this light absorption reflection configuration 130's quantity and the quantity of lamp pearl 120 are roughly unanimous, set up less quantity light absorption reflection configuration 130, to a certain extent, do not influence the reflection stratum completely and go out the light reflection that most lamp pearls 120 sent, and the conversion of partial light through light absorption reflection configuration 130 reflects out the blue light, thereby strengthen display panel's demonstration.

Referring to fig. 5, fig. 5 is a schematic view of a second lamp panel of the present application, in another embodiment, one light absorbing and reflecting structure 130 is disposed around each of the lamp beads 120, that is, four light absorbing and reflecting structures 130 are disposed around one of the lamp beads 120, and the adjacent lamp beads 120 do not share the light absorbing and reflecting structure 130. In this scheme, at least four light absorbing and reflecting structures 130 are configured corresponding to one lamp bead 120, and more light absorbing and reflecting structures 130 are provided, so that the intensity of blue light is stronger. The film thickness, area, etc. of each of the light absorbing reflective structures 130 described above are the same, unless otherwise indicated. It is understood that the scheme of configuring four light absorbing and reflecting structures 130 by one lamp bead 120 in the present embodiment can be applied to a non-display area of a display panel, and the scheme of configuring one light absorbing and reflecting structure 130 by one lamp bead 120 can be applied to a display area of a display panel.

The area of the light panel 110 is often larger than the area of the display panel, and the blue light intensity of the peripheral area 102 can be increased because the light panel 110 is not directly involved in the display for the light beads 120 correspondingly arranged in the non-display area of the display panel. From another perspective, the problem of yellowing of the edge of the display panel is more serious, and the problem of uneven yellowing of the display panel can be solved.

The light absorbing and reflecting structure 130 may be circular, square or ring-shaped in the projection of the light panel 110, wherein, for example, the ring-shaped light absorbing and reflecting structure is shown in fig. 6, fig. 6 is a schematic view of a third light panel of the present application, and the specific ring-shaped light absorbing and reflecting structure 130 may be disposed around one light bead 120, and the light bead 120 is disposed at the center of the inner circle of the ring shape. For the reflective layer, the reflective layer is not provided at the position where the lamp beads 120 or the light absorbing and reflecting structure 130 are provided, and the reflective layer is hollow.

Referring to fig. 7, in an embodiment, the light-emitting surface of the backlight module 100 is divided into a central area 101 and a peripheral area 102, the peripheral area 102 is disposed around the central area 101, the central area 101 corresponds to a central display area of the display panel, and the peripheral area 102 corresponds to a peripheral display area of the display panel. In order to solve the problem of uneven yellowing of the central display area and the peripheral display area of the display panel, in this embodiment, the areas of the light absorbing and reflecting film layers of the central area 101 and the peripheral area 102 may be set differently, for example, the area of the light absorbing and reflecting structure 130 of the peripheral area 102 is larger, so as to realize more blue light reflection. In the present embodiment, the intensity of the emitted blue light can be adjusted by changing the area of the light absorbing and reflecting structure 130.

In addition to the different areas, the layers of the light absorbing and reflecting structure 130 that include different areas are configured differently. For example, the thickness of the silicon oxide layer 133 and the amorphous silicon layer 132 in the light absorbing and reflecting structure 130 of the central region 101 is thinner. For another example, the light absorbing reflective structure 130 of the central region 101 uses only two film layers, i.e., the silicon dioxide layer 133 and the amorphous silicon layer 132, while the light absorbing reflective structure 130 of the peripheral region 102 uses three film layers, i.e., the amorphous silicon layer 132, the silicon dioxide layer 133 and the magnesium layer 131.

In another embodiment, each light absorbing and reflecting structure 130 includes at least an amorphous silicon layer 132 and a silicon dioxide layer 133, in one case a three-layer film structure of the magnesium layer 131, the amorphous silicon layer 132 and the silicon dioxide layer 133 is selected, and in other cases a two-layer film structure of the amorphous silicon layer 132 and the silicon dioxide layer 133 is selected.

In yet another embodiment, the backlight module 100 includes a central area 101 and a peripheral area 102, wherein the peripheral area 102 is disposed around the central area 101, and the density of the light absorbing and reflecting structures 130 in the central area 101 is smaller than the density of the light absorbing and reflecting structures 130 in the peripheral area 102.

In particular, controlling the intensity of the reflected blue light may be achieved by controlling the density or number of light absorbing reflective structures 130. Such as a greater density of light absorbing reflective structures 130 for the peripheral region 102, a smaller spacing between each other, a greater number, etc., while the density of light absorbing reflective structures 130 for the central region 101 is less. The plurality of light absorbing and reflecting structures 130 may be uniformly arranged in the central region 101, and the density of the plurality of light absorbing and reflecting structures 130 may be gradually increased in the extending direction of the central region 101 toward the peripheral region 102 in order to improve the yellowing phenomenon of the peripheral region 102.

In addition to the number and density, the thickness of the films of each light absorbing reflective structure 130 can be varied. Specifically, the thickness of each film layer of the light absorbing and reflecting film layer 134 in the central region 101 may be made thinner, and the thickness of each film layer of the light absorbing and reflecting film layer 134 may be gradually increased in the direction extending toward the edge.

Generally, the light emitting surface of the backlight module 100 is slightly larger than the display area of the display panel, and the area of the backlight module 100 beyond the display area, i.e. the area corresponding to the non-display area of the display panel is an edge area, so that an entire light-absorbing reflective film layer 134 can be formed in the edge area, and a plurality of light-absorbing reflective structures 130 are used in the central area 101 and the peripheral area 102 to form an array distribution.

It can be understood that the above ways of changing the area, the number, the density and the thickness of each film layer of the light absorbing and reflecting structure 130 can be combined or used independently, so as to improve the yellowing problem of different areas of the display panel, and the occurrence of transition at the junctions of different areas, and the like, and the number, the density, the thickness, the area and other parameters of the light absorbing and reflecting structure 130 can be reasonably set according to practical situations in the field to achieve the purpose of adjusting the yellowing problem of the display panel.

Embodiment two:

fig. 8 is a schematic diagram of a backlight module according to a second embodiment of the present application, and as shown in fig. 8, a backlight module 100 is disclosed as a second embodiment of the present application, the backlight module 100 includes a lamp panel 110, a plurality of light absorbing and reflecting structures 130, and a diffusion plate 140, and a plurality of lamp beads 120 are arranged on the lamp panel 110 in an array manner; the light absorbing and reflecting structures 130 are disposed on the light panel 110 and spaced from the light beads 120, and the light absorbing and reflecting structures 130 are used for absorbing light emitted by the light beads 120 and reflecting blue light; the diffusion plate 140 is disposed at a side of the lamp beads 120 away from the lamp panel 110, for homogenizing the light emitted from the lamp beads 120; wherein at least one side of each of the lamp beads 120 is provided with the light absorbing and reflecting structure 130.

The backlight module 100 further includes a side plate 111, at least one side plate 111 is disposed on the side of the light panel 110, and an included angle is formed between the side plate 111 and the light panel 110, and the included angle is between 90 degrees and 135 degrees; the side plate 111 is provided with a light absorbing and reflecting film 134 near the diffusion plate 140, and the light absorbing and reflecting film 134 is used for absorbing the light emitted by the lamp beads 120 and reflecting blue light.

It can be understood that one side of the side plate 111 abuts against one side of the light panel 110 and forms an included angle of 90 degrees, that is, the side plate 111 is disposed perpendicular to the light panel 110, and the width of the side plate 111 is related to the distance between the light panel 110 and the diffusion plate 140. When the included angle is 135 degrees, the side plate 111 is in a maximum inclined state. The side plate 111 is used for reflecting the oblique light emitted from the lamp beads 120 onto the display panel, and in this embodiment, the light absorbing and reflecting film 134 is disposed on the side plate 111, so that the oblique light emitted from the lamp beads 120 is absorbed and reflected by the light absorbing and reflecting film 134 to obtain blue light.

Specifically, the light absorbing and reflecting film layer 134 is formed by arranging a plurality of light absorbing and reflecting structures 130 in an array, and gaps are arranged between adjacent light absorbing and reflecting structures 130; the same scheme as the design of the first embodiment is not repeated here, except that the light absorbing and reflecting structure 130 having a gradient change along the first direction may be provided.

Referring to fig. 9, a schematic view of a side plate of a second embodiment of the present application of fig. 9 is shown. For example: the light absorbing and reflecting film layer 134 may employ a plurality of light absorbing and reflecting structures 130, and in the first direction, the area of the light absorbing and reflecting structures 130 becomes gradually larger; wherein the first direction is an extending direction of the side plate 111 from a side close to the lamp panel 110 to a side far from the lamp panel 110.

In this embodiment, since the bottom of the side plate 111 is located closer to the lamp panel 110, the intensity of the received light is greater. Therefore, the area of the light absorbing and reflecting structure 130 correspondingly arranged is smaller, and the area of the light absorbing and reflecting structure 130 is further increased along with the gradual weakening of the light intensity, so that the intensity of blue light is increased, and more uniform blue light is realized. It will be appreciated that in this embodiment, a controlled variable method is used, i.e. other parameters such as the number, spacing, thickness, etc. of the light absorbing reflective structures 130 remain unchanged in the case of a change in the control area.

For example, in the first direction, the distance between adjacent light absorbing and reflecting structures 130 is reduced, and the present embodiment is another arrangement scheme of light absorbing and reflecting structures 130 that realizes gradient change, compared with the previous embodiment, when forming light absorbing and reflecting structures 130, it is not necessary to form light absorbing and reflecting structures 130 with different areas, but only by arranging the distance between adjacent light absorbing and reflecting structures 130.

Also for example, in the first direction, the density of the plurality of the light absorbing reflective structures 130 increases.

In another embodiment, the light absorbing and reflecting film 134 can be a whole film and is disposed to cover the side plates 111. A three-layer structure composed of amorphous silicon (a-si), silicon dioxide and magnesium, or a two-layer structure composed of amorphous silicon (a-si) and silicon dioxide may be employed.

The side plate 111 may be integrally formed with the light plate 110, or may be formed of different materials. It can be understood that the width of the side plate 111 needs to be set according to the distance between the light panel 110 and the diffusion plate 140, and the number of the light absorbing and reflecting structures and the area of the light absorbing and reflecting film 134 on the side plate 111 can be designed according to practical situations to meet the requirements of display panels with different specifications.

Specifically, in this embodiment, four side plates 111 may be disposed at four edges of the lamp panel 110, and the four side plates 111 may be simultaneously provided with the light-absorbing reflective film layer 134 or the light-absorbing reflective structure 130, or may be disposed on only two opposite side plates 111, and the remaining two side plates 111 are provided with reflective sheets.

Embodiment III:

fig. 10 is a schematic view of a backlight module according to a third embodiment of the present application, and as shown in fig. 10, a backlight module is disclosed as a third embodiment of the present application, the backlight module includes a lamp panel, a plurality of light absorbing and reflecting structures and a diffusion plate, and a plurality of lamp beads are arranged on the lamp panel in an array manner; the light absorption and reflection structures are arranged on the lamp panel and are arranged at intervals with the lamp beads, and the light absorption and reflection structures are used for absorbing light rays emitted by the lamp beads and reflecting blue light rays; the diffusion plate is arranged on one side of the lamp beads, which is away from the lamp panel, and is used for homogenizing light rays emitted by the lamp beads; wherein, at least one side of each lamp pearl is provided with the light absorption reflection structure.

The backlight module further comprises a side plate 111 and a first driving structure 160, wherein at least one side plate 111 is arranged, the side plate 111 is arranged at the edge of the lamp panel 110 and forms an included angle with the lamp panel, and the included angle is between 90 degrees and 135 degrees; the side plate is provided with a light absorption and reflection film layer 134 near one side of the diffusion plate, the light absorption and reflection film layer is used for absorbing light rays emitted by the lamp beads and reflecting blue light rays, and the light absorption and reflection film layer is provided with a plurality of light absorption and reflection structures which change in a gradient manner along a first direction; the first driving structure is configured to drive the light absorbing reflective film 134 to move along the first direction relative to the side plate, so that the total area of the light absorbing reflective structure on the side plate is changed.

The difference between this embodiment and the previous embodiment is that the previous embodiment can determine the reflection intensity of blue light only at the beginning of design. In this embodiment, by setting the first driving structure, the area of the light absorbing and reflecting structure exposed from the hollow portion is changed, so as to realize real-time adjustment of blue light. That is, on the basis of the second embodiment, the light absorbing and reflecting film layer and the side plate are provided in a two-layer structure and are movable relative to each other. Through the control of the first driving structure, the light absorption and reflection film layer moves along the first direction, the total area of the light absorption and reflection structure on the side plate is changed, the area of the exposed light absorption and reflection structure is adjusted in real time, and then the intensity of reflected blue light is adjusted in real time according to different yellowing degrees.

In another embodiment, the first driving structure may further enable the light absorbing and reflecting film layer to move along a direction perpendicular to the first direction, and meanwhile the light absorbing and reflecting film layer is provided with a gradient light absorbing and reflecting structure along the direction perpendicular to the first direction, so that adjustment is achieved.

Referring to fig. 11, in a further modification of the present embodiment, a reflective sheet 150 may be further disposed on the side plate, and a light absorbing reflective film layer 134 may be disposed between the reflective sheet 150 and the side plate 111, where the reflective sheet is provided with a plurality of hollowed-out portions 151, and a plurality of light absorbing reflective structures 131 are disposed in one-to-one correspondence with a plurality of hollowed-out portions 151. The first driving structure 160 is configured to drive the light absorbing and reflecting film layer to move, so that the opposite area of the light absorbing and reflecting structure and the hollowed-out portion is changed.

The area of the light absorption reflecting structure exposed at the position of the hollowed-out part is adjusted in real time, and then the intensity of reflected blue light is adjusted in real time according to different yellowing degrees, so that the display effect of the panel is improved. The display yellowing phenomenon of the panel, which is usually generated on the panel, can be improved to a certain extent on the premise of not losing the transmissivity of the panel and not increasing the power consumption of the backlight, the display effect of the panel is improved, the requirements of customers are met, the performance and the quality of the display are improved, and the experience and the satisfaction of users are improved.

Specifically, the first driving structure comprises a driving mechanism, a first bearing and a second bearing, wherein the first bearing and the second bearing are respectively arranged at two sides of the light absorption and reflection film layer, and when the light absorption and reflection film layer moves from the second bearing to the first bearing, the first bearing is a transmission shaft, and the second bearing is a driven shaft. When the light absorption and reflection film layer moves from the first bearing to the second bearing, the first bearing is a driven shaft, and the second bearing is a transmission shaft. The driving mechanism can drive the first bearing and the second bearing to rotate simultaneously or in a time-sharing way so as to drive the light absorption and reflection film layer to move.

It will be appreciated that portions of the light absorbing reflective film layer need to be rolled over the first and second bearings so that the light absorbing reflective film layer is moved during rotation of either the first or second bearings. In practical use, for the scheme of using the reflector plate, the distance of the light absorption and reflection film layer moving is very small, and the distance is related to the width of the hollowed-out part, and the light absorption and reflection structure is only required to be completely occupied by the hollowed-out part until the same light absorption and reflection structure is not overlapped with the hollowed-out part, namely, the distance of one hollowed-out part is moved. However, for a solution that does not use a reflective sheet, at least a length of light absorbing reflective film layer needs to be provided, and a portion of the light absorbing reflective structure needs to be rolled up in the first bearing or the second bearing.

In order to avoid breakage of the light absorbing reflective film layer, the light absorbing reflective film layer structure may be provided on a transparent film such as film adhesive or other transparent film, etc., using one or two layer arrangement. In particular by rolling the transparent film on the first bearing and the second bearing. In this embodiment, the number, density, thickness, and the like of the light absorbing and reflecting structures provided in any of the above embodiments may be combined to better solve the yellowing problem of the display panel.

Embodiment four:

referring to fig. 12, fig. 12 is a schematic diagram of a display device according to the present application, and the present application also discloses a display device 200, where the display device 200 includes a display panel 210 and the backlight module 100 in any of the above embodiments, and the backlight module 100 provides a light source for the display panel 210.

It should be noted that, the inventive concept of the present application may form a very large number of embodiments, but the application documents have limited space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features may be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.

The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.

Claims

1. A backlight module, comprising:

the lamp panel is provided with a plurality of lamp beads in an array manner;

the light absorption and reflection structures are arranged on the lamp panel and are arranged at intervals with the lamp beads, and the light absorption and reflection structures are used for absorbing light rays emitted by the lamp beads and reflecting blue light rays; and

the diffusion plate is arranged on one side of the lamp beads, which is away from the lamp panel, and is used for homogenizing light rays emitted by the lamp beads;

wherein, at least one side of each lamp pearl is provided with the light absorption reflection structure.

2. The backlight module according to claim 1, wherein the light absorbing and reflecting structure comprises a magnesium layer, an amorphous silicon layer and a silicon dioxide layer;

the magnesium layer is arranged on the silicon dioxide layer, the silicon dioxide layer is arranged on the amorphous silicon layer, and one side, far away from the silicon dioxide layer, of the amorphous silicon layer is close to the lamp panel.

3. A backlight module according to claim 2, wherein the amorphous silicon layer has a thickness of 25nm-40nm, the silicon dioxide layer has a thickness of 185nm-200nm, and the magnesium layer has a thickness of 160nm.

4. The backlight module according to claim 2, wherein the light absorbing and reflecting structure comprises an amorphous silicon layer and a silicon dioxide layer;

the silicon dioxide layer is arranged on the amorphous silicon layer, and one side of the amorphous silicon layer, which is far away from the silicon dioxide layer, is close to the lamp panel;

the thickness of the amorphous silicon layer is 10nm-30nm, and the thickness of the silicon dioxide layer is 140nm-160nm.

5. The backlight module according to claim 1, wherein each of the lamp beads is provided with one of the light absorbing and reflecting structures on each of four sides thereof;

the backlight module comprises a central area and a peripheral area, wherein the peripheral area surrounds the central area, and the density of the light absorption and reflection structures positioned in the central area is smaller than that of the light absorption and reflection structures positioned in the peripheral area.

6. The backlight module according to claim 1, further comprising a side plate, wherein at least one side plate is disposed on an edge of the lamp panel and forms an included angle with the lamp panel, and the included angle is between 90 degrees and 135 degrees;

the side plate is provided with a light absorption and reflection film layer near one side of the diffusion plate, and the light absorption and reflection film layer is used for absorbing light rays emitted by the lamp beads and reflecting blue light rays.

7. A backlight module according to claim 6, wherein the light-absorbing reflective film layer is formed by arranging a plurality of light-absorbing reflective structures in an array, and gaps are arranged between adjacent light-absorbing reflective structures;

in the first direction, the area of the light absorbing and reflecting structure gradually becomes larger;

the first direction is the extending direction of the side plate from one side close to the lamp panel to one side far away from the lamp panel.

8. A backlight module according to claim 6, wherein the light-absorbing reflective film layer is formed by arranging a plurality of light-absorbing reflective structures in an array, and gaps are arranged between adjacent light-absorbing reflective structures;

in the first direction, the spacing between adjacent light absorbing and reflecting structures becomes smaller or the density of a plurality of the light absorbing and reflecting structures increases;

9. A backlight module according to claim 7 or 8, further comprising a first driving structure for driving the light absorbing reflective film layer to move along the first direction relative to the side plate, such that the total area of the light absorbing reflective structures on the side plate is changed.

10. A display device comprising a display panel and a backlight module according to any one of claims 1-9.