CN210270457U - Backlight module, display module and display device - Google Patents
Backlight module, display module and display device Download PDFInfo
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- CN210270457U CN210270457U CN201921544545.3U CN201921544545U CN210270457U CN 210270457 U CN210270457 U CN 210270457U CN 201921544545 U CN201921544545 U CN 201921544545U CN 210270457 U CN210270457 U CN 210270457U
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- light
- guide plate
- backlight module
- light guide
- emitting element
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Abstract
The present disclosure relates to the display technology field, and designs a backlight module, a display module and a display device, wherein the backlight module comprises: the light guide plate comprises a light emitting surface, a bottom surface and a light inlet surface, wherein the light emitting surface and the bottom surface are oppositely arranged, the light inlet surface is connected with the light emitting surface and the bottom surface, and a concave part is arranged on one side, far away from the light emitting surface, of the light inlet surface; the side light source comprises a substrate and a light-emitting element arranged on the substrate, the substrate is abutted to the light inlet surface, and the light-emitting element extends into the recessed portion. The backlight module provided by the disclosure can reduce the condition of light leakage before light enters the light guide plate.
Description
Technical Field
The disclosure relates to the technical field of display, in particular to a backlight module, a display module and a display device.
Background
Liquid Crystal Display (LCD) devices have advantages of small size, light weight, power saving, and low radiation, and thus are widely used. The lcd device is not a self-luminous display device, and must achieve the display effect by an external light source, and generally, the lcd device uses a backlight module as a light source for providing a uniform and high-brightness lcd panel.
The light guide plate is a device for converting point and line light sources into surface light sources, and the light guide plate in the backlight module is divided into a direct type light guide plate and an edge type light guide plate, wherein the edge type light guide plate is the most widely used light guide plate.
However, in the side-in backlight scheme, the side-in light guide plate has the following problems: the light leakage problem occurs before the light enters the light guide plate, which seriously affects the appearance, the picture quality and the production efficiency of the whole display device.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to provide a backlight module, a display module and a display device capable of reducing the light leakage before light enters a light guide plate.
According to an aspect of the present disclosure, there is provided a backlight assembly including:
the light guide plate comprises a light emitting surface and a bottom surface which are arranged oppositely, and a light inlet surface connected with the light emitting surface and the bottom surface, wherein a concave part is arranged on one side of the light inlet surface, which is far away from the light emitting surface;
and the side light source comprises a substrate and a light-emitting element arranged on the substrate, the substrate is abutted against the light inlet surface, and the light-emitting element extends into the concave part.
In an exemplary embodiment of the present disclosure, the recess is a groove, and the light emitting element is located in the groove.
In an exemplary embodiment of the present disclosure, the light guide plate includes first shielding portions located at two ends of the groove, and the first shielding portions, the substrate and the groove cooperate to form a sealed accommodating space.
In an exemplary embodiment of the present disclosure, the groove has a rectangular, triangular, trapezoidal or arched shape in cross section perpendicular to an extending direction thereof.
In an exemplary embodiment of the disclosure, the recessed portion is a notch formed by recessing from the light emitting surface and the bottom surface, and the light emitting element is located in the notch.
In an exemplary embodiment of the present disclosure, the backlight module further includes:
the light-emitting element is arranged between the light guide plate and the light-reflecting sheet.
In an exemplary embodiment of the disclosure, the light guide plate includes second shielding portions located at two ends of the notch, and the second shielding portions, the substrate, the light reflecting sheet and the notch cooperate to form a sealed accommodating space.
In an exemplary embodiment of the present disclosure, a gap is provided between an outer surface of the light emitting element and an inner wall of the recess.
According to another aspect of the present disclosure, there is provided a display module, including:
the backlight module provided by any one of the above embodiments;
and the display component is arranged on the backlight module.
According to still another aspect of the present disclosure, a display device is provided, which includes the above display module.
The utility model provides a backlight module, be equipped with the depressed part on the light-incoming face of light guide plate, the light emitting component of sidelight source has stretched into in the depressed part, and the base plate butt of light guide plate and sidelight source has blocked the gap between light guide plate and the sidelight source for light emitting component's light can't spill from going out plain noodles one side between light guide plate and the sidelight source, avoids influencing the impression and the picture quality and the production efficiency of complete machine because of the light leak.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic diagram of a light guide plate and a side light source according to an embodiment of the disclosure;
fig. 2 is a side cross-sectional view of a backlight module according to an embodiment of the disclosure;
FIG. 3 is a diagram of a light path of light in a light guide plate according to an embodiment of the present disclosure;
fig. 4 is a partial cross-sectional view of a light guide plate and a side light source according to an embodiment of the disclosure;
FIG. 5 is a partial cross-sectional view of a light guide plate and a side light source according to another embodiment of the disclosure;
FIG. 6 is a partial cross-sectional view of a light guide plate and a side light source according to yet another embodiment of the disclosure;
FIG. 7 is a partial cross-sectional view of a light guide plate and a side light source according to yet another embodiment of the disclosure;
fig. 8 is a side cross-sectional view of a backlight module according to another embodiment of the disclosure;
fig. 9 is a partially enlarged view of the light guide plate, the side light source and the reflective sheet shown in fig. 8.
Description of reference numerals:
10. a light guide plate 101, a recess;
20. a side light source 201, a substrate 202 and a light emitting element;
30. a light-reflecting sheet;
40. a back plate.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
The present disclosure provides a backlight module, as shown in fig. 1, the backlight module includes a light guide plate 10 and a side light source 20, the light guide plate 10 includes a light emitting surface and a bottom surface which are oppositely disposed, and a light entering surface connected with the light emitting surface and the bottom surface, and a concave portion 101 is disposed on one side of the light entering surface away from the light emitting surface; the side light source 20 includes a substrate 201 and a light emitting element 202 provided on the substrate 201, the substrate 201 abuts against the light entrance surface, and the light emitting element 202 extends into the recess 101.
According to the backlight module provided by the disclosure, the light inlet surface of the light guide plate 10 is provided with the recessed portion 101, the light emitting element 202 of the side light source 20 extends into the recessed portion 101, and the light guide plate 10 abuts against the substrate 201 of the side light source 20, so that a gap between the light guide plate 10 and the side light source 20 is blocked, light of the light emitting element 202 cannot leak out from one side of the light outlet surface between the light guide plate 10 and the side light source 20, and the influence on the appearance, the picture quality and the production efficiency of the whole machine due to light leakage is avoided.
The light guide plate 10 may be made of optical acrylic (PMMA) or optical PC (polycarbonate) and may be shaped in different shapes, such as rectangle, circle, ellipse, arc, triangle, etc. The recess 101 on the light guide plate 10 may be formed by a one-step molding process, or may be formed by etching or the like, which is not limited in this disclosure.
Wherein, sidelight 20 can be LED lamp strip, and base plate 201 can be aluminium base board, and aluminium base board forms light emitting component 202's circuit board, arranges a plurality of light emitting component 202 on the base plate 201, and light emitting component 202 can be the lamp pearl, and a plurality of lamp pearls can become one row of evenly distributed on base plate 201, also can be two rows or more rows of array arrangement on base plate 201, as long as the lamp pearl homoenergetic lies in depressed part 101 can. In addition, the substrate 201 can be fixedly connected to the back plate 40 by bonding, welding, clamping, etc.
In one embodiment, as shown in fig. 2, the recess 101 is a groove, the inner walls of the groove are light-entering surfaces, and the light emitting element 202 is located in the groove. The concave part 101 is designed to be groove-shaped, so that the light emitting element 202 is positioned in the groove, the opening of the groove can be completely shielded through the substrate 201 of the side light source 20, no gap is left between the substrate 201 and the light inlet surface and the bottom surface of the light guide plate 10, and therefore light emitted by the light emitting element 202 is not exposed between the side light source 20 and the light emitting element 202, and the influence of light leakage on the appearance, the picture quality and the production efficiency of the whole machine is further avoided.
Specifically, as shown in fig. 3, when light reaches the light guide plate 10, the light is separated into a path a and a path b at the contact surface due to the reflection and refraction effects, and the light path b entering the light guide plate 10 is finally emitted from the light emitting surface after being mixed by the dot structure of the light guide plate 10, and forms a backlight through the action of the film to provide a light source for the liquid crystal display panel; the light on the path a generated by the reflection with the contact surface on the contact surface is reflected and refracted with the groove structure and the substrate 201 again, and finally after multiple reflections and refractions, the light reaching the side face and the side face outlet corresponding to the side face can be reduced to the lowest level, so that the problem of longitudinal light leakage can be solved.
As shown in fig. 1, the light emitting elements 202 are contained in the grooves, and the grooves are perpendicular to the side surfaces and are embedded in the grooves, so that the narrow frame is not affected by the overall structure as a widened frame, and the light loss is not serious as the black mylar sheet is adhered to absorb light due to the material characteristics of the light guide plate 10, thereby achieving a better effect of solving the longitudinal light leakage.
Further, the light guide plate 10 may include first shielding portions located at two ends of the groove, an opening of the groove is equivalent to a continuous annular opening through the arrangement of the first shielding portions, the first shielding portions and the substrate 201 cooperate to block the opening of the groove and form a closed accommodating space, so that the light emitting element 202 is located in the closed accommodating space, and light of the light emitting element 202 is completely shielded in the closed accommodating space, thereby achieving the purpose of completely preventing light leakage. The first shielding portion may be integrally formed on the light guide plate 10, or may be disposed at an end of the groove by bonding or the like to form a shield.
As shown in fig. 4, the cross section of the groove perpendicular to the extending direction is rectangular, and the extending direction is the length direction of the groove penetrating through the two side walls of the light guide plate 10 as shown in fig. 1. For example, when the light guide plate 10 is rectangular, the extending direction is the extending direction of the edge between the light inlet surface and the light outlet surface or the bottom surface. A gap is provided between the inner wall of the recess and the outer surface of the light emitting element 202 to facilitate dissipation of heat generated by the light emitting element 202.
As shown in fig. 5 to 7, the cross section of the groove perpendicular to the extending direction thereof may also be triangular, trapezoidal or arched, and the shape of the cross section of the groove is not limited in the present disclosure as long as the light emitting element 202 can be accommodated and the substrate 201 abuts against the light guide plate 10 to block the opening of the groove, and any change in the shape of the cross section of the groove falls within the protection scope of the present application.
As shown in fig. 2, the light guide plate 10 is disposed on the back plate 40, the side light source 20 is disposed on the back plate 40 at a position opposite to the light entrance surface of the light guide plate 10, the substrate 201 of the side light source 20 is fixedly connected to the light guide plate 10, a gap is formed between a side of the light guide plate 10 away from the side light source 20 and a frame on the back plate 40, and the substrate 201 can be tightly abutted to the light guide plate 10 by disposing an elastic member in the gap, so as to prevent a gap from being generated between the light guide plate 10 and the substrate 201. Wherein, the elastic component can be the rubber block, and the thickness of rubber block designs according to the width in clearance, when guaranteeing that base plate 201 and light guide plate 10 closely butt, avoids the extrusion force to light guide plate 10 too big, improves backlight unit's reliability.
In another embodiment, as shown in fig. 8, the concave portion 101 is a notch formed by recessing from the light emitting surface and the bottom surface, and the light emitting element 202 is located in the notch. Through the arrangement of the notch, when the light emitting element 202 is located in the notch, the substrate 201 can abut against the edge of the light guide plate 10 close to the light emitting surface, so as to block the gap between the light guide plate 10 and the side light source 20, so that the light of the light emitting element 202 cannot leak out from one side of the light emitting surface between the light guide plate 10 and the side light source 20, and the influence on the appearance, the picture quality and the production efficiency of the whole machine due to light leakage is avoided.
Specifically, the backlight module further includes a reflector 30, the reflector 30 may be an aluminum reflector, a glass reflector and a plastic reflector, and the plastic reflector 30 may be an acrylic reflector, a PS reflector, a PC reflector, a PVC reflector, a PET reflector.
As shown in fig. 8, the reflector 30 is provided on the bottom surface, the reflector 30 abuts against the substrate 201, and the light emitting element 202 is located between the light guide plate 10 and the reflector 30. The light reflecting sheet 30 is arranged to form the groove-shaped recessed portion 101 in cooperation with the light guide plate 10, so that the light emitting element 202 is positioned in the groove-shaped recessed portion 101, the opening of the groove can be completely shielded through the substrate 201 of the side light source 20, no gap is left between the substrate 201 and the light inlet surface and the bottom surface of the light guide plate 10, and therefore light emitted by the light emitting element 202 is not exposed between the side light source 20 and the light emitting element 202, and the influence of light leakage on the appearance, the picture quality and the production efficiency of the whole machine is further avoided.
Specifically, the light guide plate 10 may include a second shielding portion located at two ends of the notch, and the opening of the notch is equivalent to a continuous annular opening through the arrangement of the second shielding portion and the light-reflecting sheet 30, and the second shielding portion, the substrate 201 and the light guide plate 10 cooperate to block the opening of the notch and form a closed accommodating space, so that the light-emitting element 202 is located in the closed accommodating space, and the light of the light-emitting element 202 is completely shielded in the closed accommodating space, thereby achieving the purpose of completely preventing light leakage. The second shielding portion may be integrally formed on the light guide plate 10, or may be disposed at an end of the groove by bonding or the like to form a shield.
As shown in fig. 9, the perpendicular cross section of the notch in the extending direction is rectangular, and the extending direction is the length direction of the notch penetrating through the two side walls of the light guide plate 10. For example, when the light guide plate 10 is rectangular, the extending direction is the extending direction of the edge between the light inlet surface and the light outlet surface or the bottom surface. A gap is formed between the inner wall of the notch and the outer surface of the light emitting element 202 to facilitate dissipation of heat generated by the light emitting element 202.
In addition, the cross section of the notch may also be in a shape of a trapezoid, a triangle, an arch, etc., and the shape of the cross section of the notch is not limited in the present disclosure as long as the light emitting element 202 can be accommodated so that the substrate 201 abuts against the light guide plate 10 and the reflector 30 to block the opening of the groove, and all changes in the shape of the cross section of the notch belong to the protection scope of the present application.
As shown in fig. 8, the reflective sheet 30 is disposed on the ground of the light guide plate 10, then the light guide plate 10 is disposed on the back plate 40, the reflective sheet 30 abuts against the back plate 40, the side light source 20 is disposed on the back plate 40 at a position opposite to the light entrance surface of the light guide plate 10, the substrate 201 of the side light source 20 is fixedly connected to the light guide plate 10, a gap is formed between the side of the light guide plate 10 away from the side light source 20 and the frame on the back plate 40, and the substrate 201 can be tightly abutted against the light guide plate 10 by disposing an elastic member in the gap, thereby preventing a gap from being formed between the light guide plate 10 and the substrate.
Wherein, the elastic component can be the rubber block, and the thickness of rubber block designs according to the width in clearance, when guaranteeing that base plate 201 and light guide plate 10 closely butt, avoids the extrusion force to light guide plate 10 too big, improves backlight unit's reliability.
The present disclosure further provides a display module, which includes a display module and the backlight module provided by the above embodiment, wherein the display module is disposed on the backlight module. The display module adopts the backlight module, so that the influence on the appearance, the picture quality and the production efficiency of the whole machine due to light leakage can be avoided, and a lot of beneficial effects refer to the description of the backlight module, which is not repeated herein.
The present disclosure further provides a display device, which includes the display module set described above to improve the display effect of the display device, and many beneficial effects thereof refer to the description of the backlight module set described above, which is not repeated herein. The display device may be, for example: mobile phones, tablet computers, notebook computers, televisions, advertising screens and other devices with display panels.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A backlight module, comprising:
the light guide plate comprises a light emitting surface and a bottom surface which are arranged oppositely, and a light inlet surface connected with the light emitting surface and the bottom surface, wherein a concave part is arranged on one side of the light inlet surface, which is far away from the light emitting surface;
and the side light source comprises a substrate and a light-emitting element arranged on the substrate, the substrate is abutted against the light inlet surface, and the light-emitting element extends into the concave part.
2. A backlight module according to claim 1, wherein the recess is a groove, and the light emitting element is located in the groove.
3. The backlight module as claimed in claim 2, wherein the light guide plate includes first shielding portions at two ends of the recess, and the first shielding portions, the substrate and the recess cooperate to form a sealed accommodating space.
4. The backlight module according to claim 2, wherein the grooves have a rectangular, triangular, trapezoidal or arched cross-section perpendicular to the extending direction.
5. The backlight module as claimed in claim 1, wherein the recess is a notch formed by recessing the light-emitting surface and the bottom surface, and the light-emitting element is located in the notch.
6. The backlight module according to claim 5, further comprising:
the light-emitting element is arranged between the light guide plate and the light-reflecting sheet.
7. The backlight module as claimed in claim 6, wherein the light guide plate includes second shielding portions at two ends of the notch, and the second shielding portions, the substrate, the reflector and the notch cooperate to form a sealed receiving space.
8. A backlight module according to claim 1, wherein a gap is provided between an outer surface of the light emitting element and an inner wall of the recess.
9. A display module, comprising:
a backlight module according to any one of claims 1 to 8;
and the display component is arranged on the backlight module.
10. A display device comprising the display module of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921544545.3U CN210270457U (en) | 2019-09-17 | 2019-09-17 | Backlight module, display module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921544545.3U CN210270457U (en) | 2019-09-17 | 2019-09-17 | Backlight module, display module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210270457U true CN210270457U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921544545.3U Expired - Fee Related CN210270457U (en) | 2019-09-17 | 2019-09-17 | Backlight module, display module and display device |
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| CN (1) | CN210270457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112965296A (en) * | 2021-03-17 | 2021-06-15 | 深圳创维－Rgb电子有限公司 | Backlight module and display device |
-
2019
- 2019-09-17 CN CN201921544545.3U patent/CN210270457U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112965296A (en) * | 2021-03-17 | 2021-06-15 | 深圳创维－Rgb电子有限公司 | Backlight module and display device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |