CN116953981A - Backlight module and display device - Google Patents

Abstract

The application provides a backlight module and a display device, wherein the backlight module comprises a lamp panel, a plurality of groups of light emitting devices are arranged on the lamp panel, and each group of light emitting devices generates light rays with at least two colors; the backboard comprises a supporting part and a side edge part positioned at the edge of the supporting part, and the supporting part and the side edge part are enclosed to form a groove for installing the lamp panel; the side edge part is at least partially transparent to transmit light of the light emitting device to the outside of the backlight module. According to the application, the partial area of the side edge part of the backboard is transparent, after the light emitting device on the lamp panel emits light, the light of the light emitting device can pass through the light transmission area of the side edge part of the backboard, so that a soft light environment is created for eyes when a user watches video programs, the contrast between a display picture and the surrounding environment is reduced, and visual fatigue is reduced.

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

The backlight module is an important part of the display panel, and provides sufficient brightness and uniformly distributed light sources for the display module, so that the display module can normally display images.

Currently, a backlight module generally includes a back plate and a lamp panel, wherein the back plate provides a mounting base for parts such as the lamp panel, and the lamp panel generates a surface light source to display images through a display module. However, when the display panel works, visual fatigue is generated after the user views the display panel for a long time due to the contrast between the picture of the display panel and the surrounding environment.

Disclosure of Invention

The application provides a backlight module and a display device, which aim to solve the technical problem that the prior user is easy to generate visual fatigue after watching a screen for a long time.

In a first aspect, the present application provides a backlight module, comprising:

the lamp panel is provided with a plurality of groups of light emitting devices, and each group of light emitting devices generates light rays of at least two colors;

the backboard comprises a supporting part and a side edge part positioned at the edge of the supporting part, and the supporting part and the side edge part are enclosed to form a groove for installing the lamp panel;

the side edge part is at least partially transparent to transmit light of the light emitting device to the outside of the backlight module.

In some embodiments, the side edge part is provided with a through groove, and a light-transmitting sheet is arranged in the through groove;

the light transmitting sheet is provided with a light incident side and a light emergent side which are opposite, the lamp panel is positioned on the light incident side of the light transmitting sheet, and the light transmitting sheet is used for transmitting light rays incident from the light incident side and reflecting the light rays incident from the light emergent side.

In some embodiments, the light-transmitting sheet comprises a transparent medium layer and a unidirectional perspective film, and the unidirectional perspective film is attached to the surface of the transparent medium layer;

the transparent medium layer is positioned on the light incident side, and the unidirectional perspective film is positioned on the light emergent side.

In some embodiments, the light-transmitting sheet further comprises a light-transmitting layer, and the light-transmitting layer is attached to one side of the transparent medium layer, which is away from the unidirectional perspective film;

the light-transmitting layer is provided with a light-transmitting area and a fuzzy area, the light-transmitting area and the fuzzy area are filled on the surface of the light-transmitting layer, and the light-transmitting area is provided with a preset shape.

In some embodiments, the height of the through groove from the bottom of the groove is less than or equal to the height of the lamp panel from the bottom of the groove.

In some embodiments, the edge of the lamp panel and the side edge part have a preset distance, and the light absorbing layer between the lamp panel and the side edge part is arranged on the supporting part.

In some embodiments, the light intensity of the light emitting device at the edge of the panel is greater than the light intensity of the light emitting device in the middle of the panel.

In some embodiments, each set of light emitting devices includes a first bead, a second bead, and a third bead;

the first lamp bead is used for generating red light, the second lamp bead is used for generating green light, and the third lamp bead is used for generating blue light.

In some embodiments, the diffusion film is located on a side of the lamp panel facing away from the back plate;

the diffusion film is used for mixing red light, green light and blue light into white light.

In a second aspect, the present application provides a display device comprising a backlight module as described in the first aspect.

According to the application, the partial area of the side edge part of the back plate is set to be transparent, after the light emitting devices on the lamp panel emit light, the light of the light emitting devices can pass through the light transmission area of the side edge part of the back plate, so that the light of the light emitting devices can be transmitted to the outside of the backlight module, and meanwhile, as each group of light emitting devices can emit at least two kinds of light, the color and the intensity of each group of light emitting devices can be changed according to different images in the display content of the display panel, a soft light environment is created for eyes when a user watches a video program, the contrast between a display picture and the surrounding environment is reduced, and the visual fatigue is lightened.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a backlight module according to an embodiment of the application;

FIG. 2 is a schematic structural view of a light transmitting sheet according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating light propagation of a backlight module according to an embodiment of the application;

fig. 4 is a schematic view of a light-transmitting layer according to an embodiment of the present application.

The LED lamp comprises a 10 lamp panel, an 11 light-emitting device, a 111 first lamp bead, a 112 second lamp bead, a 113 third lamp bead, a 20 back plate, a 21 supporting part, a 22 side edge part, a 221 through groove, a 222 light-transmitting sheet, a 2221 transparent medium layer, a 2222 unidirectional perspective film, a 2223 light-transmitting layer, a 210 light-transmitting area, a 220 fuzzy area, a 200 groove, a 23 light-absorbing layer and a 30 diffusion film.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application 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 present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The embodiment of the application provides a backlight module and a display panel, which are respectively described in detail below.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a display panel according to an embodiment of the application, wherein a backlight module includes:

the lamp panel 10, there are multiple groups of luminescent devices 11 on the lamp panel 10, each group of luminescent devices 11 produces the light of at least two kinds of colors;

the back plate 20, the back plate 20 comprises a supporting part 21 and a side edge part 22 positioned at the edge of the supporting part 21, and the supporting part 21 and the side edge part 22 are enclosed to form a groove 200 for installing the lamp panel 10;

wherein, the side edge 22 is transparent at least in partial area to transmit the light generated by the light emitting device 11 to the outside of the backlight module.

Specifically, the lamp panel 10 is used for generating a surface light source with sufficient brightness and uniform distribution, so that the display module (e.g. liquid crystal display module) can normally display images. Wherein, the lamp panel 10 is provided with a plurality of groups of light emitting devices 11, each group of light emitting devices 11 comprises a plurality of light emitting units, and can generate light rays with at least two colors, so that the color and the intensity of each group of light emitting devices 11 can be changed, and the effect of generating an atmosphere lamp is achieved. The light emitting device 11 may be an inorganic light emitting diode, an organic light emitting diode, a quantum dot light emitting unit, or the like, for example.

The back plate 20 is used for providing a mounting foundation for the lamp panel 10, wherein the back plate 20 comprises a supporting portion 21 and a side edge portion 22 located at the edge of the supporting portion 21, the supporting portion 21 and the side edge portion 22 enclose to form a groove 200 for mounting the lamp panel 10, when the lamp panel 10 is mounted on the back plate 20, the supporting portion 21 is attached to the back surface of the lamp panel 10, and the side edge portion 22 covers the side surface of the lamp panel 10, so that the whole lamp panel 10 is embedded into the groove 200 formed by enclosing the supporting portion 21 and the side edge portion 22. Generally, the lamp panel 10 is rectangular in shape, and thus the recess 200 is a rectangular sink with a size matching the lamp panel 10. It is understood that the lamp panel 10 and the recess 200 may have other shapes, such as a circular diamond shape.

According to the application, the partial area of the side edge part 22 of the back plate 20 is set to be transparent, after the light emitting device 11 on the lamp panel 10 emits light, the light of the light emitting device 11 can pass through the light transmission area of the side edge part 22 of the back plate 20, so that the light of the light emitting device 11 is transmitted to the outside of the backlight module, and meanwhile, as each group of light emitting devices 11 can emit at least two kinds of light, the color and intensity of each group of light emitting devices 11 can be changed according to different images in the display content of the display panel, a soft light environment is created for eyes when a user watches a video program, the contrast between a display picture and the surrounding environment is reduced, and the visual fatigue is lightened.

As an example, referring to fig. 1, each group of light emitting devices 11 includes a first lamp bead 111, a second lamp bead 112, and a third lamp bead 113, the first lamp bead 111 is used for generating red light, the second lamp bead 112 is used for generating green light, and the third lamp bead 113 is used for generating blue light. When the first, second and third beads 111, 112 and 113 are operated at the same time, the red, green and blue light are mixed to form white light, thereby providing a white backlight source; when the red is displayed in the picture area of the display panel, the first lamp beads 111 in the corresponding area can be correspondingly turned on, and the red backlight source can enable the red displayed on the display panel to be purer because of no crosstalk of blue and green color light, and meanwhile, the light emitted from the transparent area through the side edge part 22 is red, so that the picture of the display panel is extended, the contrast between the display picture and the surrounding environment is reduced, and visual fatigue is reduced.

It can be understood that when the display panel is displaying green, blue or other colors, the corresponding lamp beads can be turned on, and the light with the same color as the display area passes through the transparent area of the side edge 22, so as to improve the color expression capability of the display and reduce the contrast between the display and the surrounding environment.

In order to avoid the phenomenon that a large amount of ambient light enters the backlight module through the transparent area of the side edge 22 to pollute the surface light source of the lamp panel 10, in some embodiments of the present application, referring to fig. 1, the side edge 22 is provided with a through slot 221, a light-transmitting sheet 222 is installed in the through slot 221, the light-transmitting sheet 222 has a light incident side and a light emergent side opposite to each other, the lamp panel 10 is located at the light incident side of the light-transmitting sheet 222, and the light-transmitting sheet 222 is used for transmitting the light incident from the light incident side and reflecting the light incident from the light emergent side. After the light of the light emitting device 11 is emitted from the light incident side to the light transmitting sheet 222, the light is normally emitted from the light transmitting sheet 222, so as to reduce the contrast between the display screen of the display panel and the surrounding environment; most of the ambient light is reflected after the ambient light is emitted from the light emitting side to the light transmitting sheet 222, so as to prevent a large amount of ambient light from being emitted into the backlight module, and further avoid the phenomenon that a large amount of ambient light passes through the transparent area of the side edge 22 and contaminates the surface light source of the lamp panel 10.

As an exemplary embodiment of transmitting the light of the light emitting device 11 and reflecting the ambient light, referring to fig. 2, fig. 2 shows a schematic structural diagram of a light transmitting sheet 222 in an embodiment of the present application, where the light transmitting sheet 222 includes a transparent dielectric layer 2221 and a unidirectional transparent film 2222, the unidirectional transparent film 2222 is attached to the surface of the transparent dielectric layer 2221, the transparent dielectric layer 2221 is located on the light incident side, and the unidirectional transparent film 2222 is located on the light emitting side. Specifically, the transparent dielectric layer 2221 may be a transparent material layer such as glass or acryl, the unidirectional transparent film 2222 may be a thin film layer formed of tin or silver, when the light emitting device 11 emits light, the unidirectional transparent film 2222 may have a higher light intensity so as to generate an atmosphere lamp effect, and when the ambient light irradiates, the unidirectional transparent film 2222 reflects part of the ambient light back, thereby preventing a large amount of ambient light from being injected into the backlight module.

It will be appreciated that the side edge 22 may also be directly made of a transparent material, and then the one-way see-through film 2222 may be directly attached to the side edge 22 to reflect ambient light.

Further, with continued reference to fig. 2 and fig. 4, fig. 4 shows a schematic structural diagram of a light-transmitting layer 2223 in an embodiment of the present application, the light-transmitting sheet 222 further includes a light-transmitting layer 2223, the light-transmitting layer 2223 is attached to a side of the transparent dielectric layer 2221 facing away from the unidirectional perspective film 2222, the light-transmitting layer 2223 has a light-transmitting area 210 and a blurring area 220, the light-transmitting area 210 and the blurring area 220 fill up the surface of the light-transmitting layer 2223, and the light-transmitting area has a preset shape, such as an equilateral pentagon shape, a triangle shape, a pentagon shape, and the like. When the backlight module works, light passing through the light-transmitting region 210 can directly pass through, and light passing through the blurring region 220 is reflected and refracted, so that the intensity of the light passing through the blurring region 220 is lower than that of the light-transmitting region 210, the light-transmitting region 210 is highlighted to generate a pattern with the same shape as that of the preset light, and the ornamental value of the light emitted from the side edge 22 is improved.

It will be appreciated that scattering particles, such as particles of organic or inorganic materials, may be disposed within the obscured region 220 of the light transmissive layer 2223, such that light passing through the obscured region 220 is reflected or refracted.

Further, in order to avoid that the display effect of the display module is affected by the ambient light entering the backlight module, referring to fig. 3, the height H1 of the through groove 221 from the bottom of the groove 200 is smaller than or equal to the height H2 of the lamp panel 10 from the bottom of the groove 200. In the backlight module working process, the light of the light emitting device 11 faces upwards, the external ambient light faces the side face of the lamp panel 10, and the height H1 of the through groove 221 from the bottom of the groove 200 is smaller than or equal to the height H2 of the lamp panel 10 from the bottom of the groove 200, so that the light emitted into the display module upwards is reduced, and the interference of the ambient light on the display effect of the display module is further reduced.

Further, with continued reference to fig. 3, the edge of the lamp panel 10 and the side edge 22 have a predetermined distance, the supporting portion 21 is provided with a light absorbing layer 23 located between the lamp panel 10 and the side edge 22, and generally, the light absorbing layer 23 is made of a dark (e.g. black) material, and after the ambient light is injected into the backlight module, the light absorbing layer 23 can absorb the ambient light, so as to prevent the ambient light from being reflected in the backlight module for multiple times and then being emitted to the upper side of the lamp panel 10.

Further, since the light at the edge of the lamp panel 10 enters the external environment through the transparent area of the side edge 22, in order to avoid the phenomenon that the light intensity at the edge of the lamp panel 10 is weaker and affects the display effect of the display module, in some embodiments of the present application, the light intensity of the light emitting device 11 at the edge of the lamp panel 10 is greater than the light intensity of the light emitting device 11 in the middle of the lamp panel 10, so that the light intensity at the edge of the lamp panel 10 can be reinforced, thereby ensuring the uniformity of the light intensity emitted from the lamp panel 10.

In some embodiments of the present application, for example, for each group of light emitting devices 11 including the first light bead 111, the second light bead 112, and the third light bead 113, referring to fig. 1, the backlight module further includes a diffusion film 30, where the diffusion film 30 is located on a side of the light panel 10 facing away from the back plate 20, and the diffusion film 30 is used to mix red light, green light, and blue light into white light. After the red light, the green light and the blue light are incident into the diffusion film 30, the red light, the green light and the blue light are refracted, reflected and scattered, so that the traveling route of the light is changed, the red light, the green light and the blue light are mixed into white light, the effect of fully scattering the incident light and generating white light is realized, and the light emitting uniformity of the backlight module is ensured.

It should be noted that the above description of the light emitting device is intended to clearly illustrate the implementation of the present application, and the skilled person may also make equivalent modifications, such as providing a light absorbing layer on the side of the lamp panel, to avoid the lamp panel reflecting ambient light, under the guidance of the present application.

Further, in order to better implement the backlight module in the embodiment of the present application, a display panel is further provided in the embodiment of the present application, where the display panel includes the backlight module in any of the above embodiments. The display panel in the embodiment of the present application has all the beneficial effects of the backlight module because the backlight module in the embodiment is provided, and will not be described herein.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the present disclosure, and therefore, such modifications, improvements, and adaptations are intended to be within the spirit and scope of the exemplary embodiments of the present disclosure.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.

Similarly, it should be noted that in order to simplify the description of the present disclosure and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are required by the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations in some embodiments for use in determining the breadth of the range, in particular embodiments, the numerical values set forth herein are as precisely as possible.

Each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited herein is hereby incorporated by reference in its entirety except for any application history file that is inconsistent or otherwise conflict with the present disclosure, which places the broadest scope of the claims in this application (whether presently or after it is attached to this application). It is noted that the description, definition, and/or use of the term in the appended claims controls the description, definition, and/or use of the term in this application if there is a discrepancy or conflict between the description, definition, and/or use of the term in the appended claims.

The above describes a backlight module and a display panel provided by the embodiments of the present application in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, and the above description of the embodiments is only for helping to understand the method and core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.

Claims (10)

1. A backlight module, comprising:

the LED lamp comprises a lamp panel, wherein a plurality of groups of light emitting devices are arranged on the lamp panel, and each group of light emitting devices generates light rays with at least two colors;

the back plate comprises a supporting part and a side edge part positioned at the edge of the supporting part, and the supporting part and the side edge part are enclosed to form a groove for installing the lamp panel;

wherein, the side edge part is at least partially transparent to transmit the light of the light emitting device to the outside of the backlight module.

2. The backlight module according to claim 1, wherein the side edge portion is provided with a through groove, and a light transmitting sheet is installed in the through groove;

the light-transmitting sheet is provided with a light-entering side and a light-exiting side which are opposite, the lamp panel is positioned on the light-entering side of the light-transmitting sheet, and the light-transmitting sheet is used for transmitting light rays entering from the light-entering side and reflecting the light rays entering from the light-exiting side.

3. The backlight module according to claim 2, wherein the light-transmitting sheet comprises a transparent dielectric layer and a unidirectional see-through film, and the unidirectional see-through film is attached to the surface of the transparent dielectric layer;

the transparent medium layer is positioned on the light incident side, and the unidirectional perspective film is positioned on the light emergent side.

4. The backlight module of claim 3, wherein the light-transmitting sheet further comprises a light-transmitting layer attached to a side of the transparent dielectric layer facing away from the one-way see-through film;

the light-transmitting layer is provided with a light-transmitting area and a blurring area, and the light-transmitting area is provided with a preset shape.

5. The backlight module of claim 2, wherein the height of the through groove from the bottom of the groove is less than or equal to the height of the lamp panel from the bottom of the groove.

6. The backlight module according to claim 1, wherein the edge of the lamp panel and the side edge portion have a predetermined distance, and the light absorbing layer is disposed between the lamp panel and the side edge portion on the supporting portion.

7. The backlight module of claim 1, wherein the light intensity of the light emitting device at the edge of the lamp panel is greater than the light intensity of the light emitting device in the middle of the lamp panel.

8. The backlight module according to any one of claims 1 to 7, wherein each set of the light emitting devices comprises a first bead, a second bead, and a third bead;

the first lamp beads are used for generating red light, the second lamp beads are used for generating green light, and the third lamp beads are used for generating blue light.

9. The backlight module of claim 8, further comprising a diffusion film on a side of the lamp panel facing away from the back plate;

the diffusion film is used for mixing red light rays, green light rays and blue light rays into white light rays.

10. A display device comprising a backlight module as claimed in any one of claims 1 to 9.