CN106195754B - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN106195754B CN106195754B CN201510219983.2A CN201510219983A CN106195754B CN 106195754 B CN106195754 B CN 106195754B CN 201510219983 A CN201510219983 A CN 201510219983A CN 106195754 B CN106195754 B CN 106195754B
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- light
- backlight module
- guide plate
- light guide
- groove
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Abstract
A backlight module comprises a light guide plate, at least one light source, an optical diaphragm group, a back plate, a rubber frame and a structure. The light guide plate is provided with at least one light incident surface, a light emergent surface and a bottom surface, and the light source is arranged on the light incident surface and used for emitting blue light. The optical film set is stacked on the light-emitting surface of the light guide plate and comprises a color conversion sheet for converting blue light into white light. The rubber frame is provided with a body part abutting against the back plate and an extension part extending from the body part to the upper part of the optical membrane group, a groove recessed towards the light guide plate is formed on one side of the extension part facing the light guide plate, a protruding structure protruding towards the light guide plate is arranged, and the distance between the protruding structure and the body part is larger than the distance between the groove and the body part. The structure is arranged on the optical film group and is contained in the groove, and a space is formed between the structure and the wall surface of the groove. The backlight module provided by the invention can improve the color conversion efficiency, reduce light leakage and improve the problem of edge bluing.
Description
Technical Field
The invention relates to a backlight module.
Background
Fig. 1 is a partial cross-sectional view of a conventional backlight module. As shown in fig. 1, the rubber frame 102 of the backlight module 100 is limited on the back plate 104 by means of alignment and abutting. Since the backlight module 100 has a narrow frame edge, the light I reflected by the rubber frame 102 is easily leaked out from the gap between the rubber frame 102 and the optical film set 108 above the light guide plate 106. If the light I is emitted from the blue light source 114, blue light leakage or blue halo is easily formed, which causes the problem of frame bluing and affects the picture quality.
The background section is only provided to aid in understanding the present disclosure, and therefore the disclosure in the background section may include some prior art that does not constitute a part of the common general knowledge of a person skilled in the art. The statements in the "background" section do not represent that matter or the problems which may be solved by one or more embodiments of the present invention, but are known or appreciated by those skilled in the art before filing the present application.
Disclosure of Invention
The invention provides a backlight module which can improve the color conversion efficiency and improve the problem of edge bluing.
Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.
In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a backlight module including a light guide plate, at least one light source, an optical film set, a back plate, a plastic frame, and a structure. The light guide plate is provided with at least one light incident surface, a light emergent surface and a bottom surface which are oppositely arranged, and the light source is arranged on the light incident surface and used for emitting blue light. The optical film set is stacked on the light-emitting surface of the light guide plate and comprises a color conversion sheet for converting blue light into white light. The light guide plate is limited by the back plate, and the rubber frame is arranged on the back plate. The rubber frame is provided with a body part abutting against the back plate and an extension part extending from the body part to the upper part of the optical membrane group, a groove recessed towards the light guide plate is formed on one side of the extension part facing the light guide plate, a protruding structure protruding towards the light guide plate is arranged, and the distance between the protruding structure and the body part is larger than the distance between the groove and the body part. The structure is arranged on the optical film group and is contained in the groove, and a space is formed between the structure and the wall surface of the groove.
In one embodiment, the body extends to an extension portion in a direction substantially parallel to the light-emitting surface. The protruding structure and the extending portion may be made of the same material, or the protruding structure may be a pad or an adhesive tape attached to one end of the extending portion.
In one embodiment, the protruding structure may form a sidewall of the groove, and the structure may contact the optical film set.
In one embodiment, a height of the protrusion end of the protrusion structure is equal to or lower than a height of the vertex of the structure.
In one embodiment, the protruding structure has an end surface and the structure has a top surface, and a horizontal height of the end surface is equal to or lower than a horizontal height of the top surface. The end face of the protruding structure and the top surface of the structure can be substantially parallel to the light-emitting surface of the light guide plate.
In one embodiment, the structure may be a pad, a gel, a tape, or a membrane, and the structure may be an opaque material.
In an embodiment, the color conversion sheet may be a quantum dot material sheet, and the quantum dot material sheet may cover the light-emitting surface of the light guide plate.
In one embodiment, the structure may contact the quantum dot material sheet.
In an embodiment, the maximum width of the groove in a direction parallel to the light-emitting surface is H1, and a maximum width of the structure in the direction is H2 and satisfies the following relation:
H1≥H2+0.2mm。
in an embodiment, the maximum height of the groove relative to the optical film set in a direction perpendicular to the light exit surface is V1, and the maximum height of the structure relative to the optical film set in the direction is V2 and satisfies the following relation:
V1≥V2+0.01mm。
in one embodiment, the light source includes at least one blue light emitting diode.
Through the design of the above embodiments, due to the matching of the protruding structure of the rubber frame extension part and the structure arranged on the optical film set, the probability that light directly enters the picture area of the backlight module from the edge can be reduced, the reflection times of the light at the edge can be increased, and the effects of improving the color conversion efficiency, reducing light leakage and improving the edge bluing problem can be obtained.
Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention. In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a partial cross-sectional view of a conventional backlight module.
Fig. 2A is a schematic partial cross-sectional view of a backlight module according to an embodiment of the invention.
Fig. 2B is a schematic top view of the backlight module of fig. 2A.
Fig. 3A and 3B are schematic views showing embodiments of the dimension design of the groove relative to the structure.
Fig. 4 is a partial cross-sectional view of a backlight module according to another embodiment of the invention.
FIG. 5 shows a chart comparing chromaticity values of an embodiment of the present invention with those of a prior art design.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.
Fig. 2A is a schematic partial cross-sectional view of a backlight module according to an embodiment of the invention. Fig. 2B is a schematic top view of the backlight module of fig. 2A, and fig. 2B omits some elements of fig. 2A for convenience of description. As shown in fig. 2A and 2B, a backlight module 10 includes a light guide plate 12, at least one light source 14, an optical film set 16, a back plate 18, a frame 20, and a structure 28. The light guide plate 12 has at least one light incident surface 12a, a light emitting surface 12b and a bottom surface 12c disposed opposite to each other, a side surface 12d opposite to the light incident surface 12a, a side surface 12e and a side surface 12f disposed opposite to each other, wherein the light incident surface 12a, the side surface 12d, the side surface 12e and the side surface 12f are all connected to the light emitting surface 12b and the bottom surface 12 c. The light source 14 is disposed on the light incident surface 12a and configured to emit a blue light, and the light source 14 may include at least one blue light emitting diode, for example. In other embodiments, the light source 14 may be disposed beside at least one of the side surfaces 12d, 12e, and 12f, but the invention is not limited thereto. The optical film set 16 is stacked on the light emitting surface 12b of the light guide plate 12, and the optical film set 16 at least includes a color conversion sheet 16a capable of converting blue light into white light. The color conversion sheet 16a may be, for example, a quantum dot material sheet contacting and covering the light emitting surface 12 b. The backlight module 10 further includes a reflective sheet 32 disposed between the light guide plate 12 and the back plate 18.
The back plate 18 limits the light guide plate 12, and the rubber frame 20 is disposed on the back plate 18. The frame 20 has a main body 22 abutting against the back plate 18 and an extending portion 24 extending from the main body 22 to above the optical film set 16. The extending portion 24 faces a side of the light guide plate 12, and a groove 24a recessed toward the light guide plate 12 and a protrusion 24b protruding toward the light guide plate 12 are sequentially formed in a direction away from the main body 22, that is, the distance between the protrusion 24b and the main body 22 is greater than that between the groove 24a and the main body 22, and when the groove 24a and the protrusion 24b are formed continuously, the protrusion 24b may form a sidewall of the groove 24 a. The structure 28 is disposed on the optical film set 16 and corresponding to the position of the groove 24a, so that the structure 28 can be accommodated in the groove 24a and has a distance with the wall surface of the groove 24 a. In the embodiment, the main body 22 of the plastic frame 20 can extend out of the extension portion 24 toward a direction P substantially parallel to the light emitting surface 12b and perpendicular to the light incident surface 12a, and the structure 28 can contact the optical film set 16, for example, can be attached to the uppermost optical film 16b of the optical film set 16. In the embodiment, the structure 28 is disposed on the optical film set 16 adjacent to the light incident surface 12a, for example, but the invention is not limited thereto. In other embodiments, structures 28 may also be disposed on optical film stack 16 adjacent side 12d, for example. In addition, in other embodiments, the main body 22 of the plastic frame 20 may extend out of the extending portion 24 in a direction R substantially parallel to the light emitting surface 12b and the light incident surface 12a, and the structure 28 may be disposed on the optical film set 16 adjacent to at least one of the side surfaces 12e and 12f, or the structure 28 may be disposed on the upper end of the optical film set 16 adjacent to the light incident surface 12a, the side surfaces 12d, 12e and 12f at the same time, depending on the needs of the user.
By the design of the protruding structure 24b in cooperation with the structure 28 disposed on the optical film set 16, the probability of light entering the frame region a of the backlight module 10 from the edge can be reduced, the light leakage of the backlight module 10 at the narrow frame side can be improved, the reflection frequency of the light at the edge can be increased, and the effect of reducing or avoiding the blue-turning of the edge can be obtained. For example, as shown in fig. 2A, the blue light I1 emitted by the light source 14 can be blocked by the protruding structure 24b and cannot enter the picture area a of the backlight module 10, the blue light I2 emitted by the light source 14 can be reflected by the structure 28 and then reflected by the reflective sheet 32 at the bottom of the light guide plate 12, and then emitted by the light emitting surface 12b, or the blue light I3 reflected by the rubber frame 20 can be reflected by the protruding structure 24b and then reflected by the reflective sheet 32 at the bottom of the light guide plate 12, and then emitted by the light emitting surface 12 b. Therefore, the arrangement of the structures 28 or the protruding structures 24b can increase the reflection times of the light at the edge, so that the blue light repeatedly passes through the color conversion sheet 16a to form a purer white light, thereby obtaining the effects of improving the color conversion efficiency and avoiding the edge bluing.
As shown in fig. 2A, in an embodiment, the protrusion structure 24b has a protrusion end surface M, and the structure 28 has a top surface N, the end surface M of the protrusion structure 24b and the top surface N of the structure 28 may be substantially parallel to the light emitting surface 12b, and a horizontal height of the end surface M (i.e., a height in a direction Q) may be equal to or lower than a horizontal height of the top surface N. When the horizontal height of the end surface M of the protrusion structure 24b is equal to or lower than the horizontal height of the top surface N of the structure 28, the effect of the protrusion structure 24b shielding the edge light leakage can be further ensured. However, the shapes of the protrusion structures 24b and the structures 28 are not limited in the present invention, and the effect of ensuring that the protrusion structures 24b block the edge light leakage can be achieved as long as the horizontal height of the protrusion end points of the protrusion structures 24b is equal to or lower than the horizontal height of the vertexes of the structures 28. In addition, the protruding structure 24b may be made of the same material as the extending portion 24 and formed integrally, or the protruding structure 24b may be made of a gasket or an adhesive tape attached to one end of the extending portion 24. The structure 28 may be, for example, but not limited to, a pad, a gel, a tape, or a film, and the structure 28 may be, for example, an opaque material. Furthermore, the side of the adhesive frame 20 facing the light guide plate 12 may be coated with a silver reflective film or a white reflective film to improve light reflectivity.
As shown in fig. 2B and 3A, in an embodiment, the maximum width of the groove 24a in the direction P parallel to the light emitting surface 12B and perpendicular to the light incident surface 12a is H1, and the maximum width of the structure 28 in the direction P is H2 and satisfies the following relation:
H1≥H2+0.2mm。
as shown in fig. 2B and 3A, in another embodiment, the maximum width of the groove 24a in the direction R parallel to the light emitting surface 12B and the light incident surface 12a is H1, and the maximum width of the structure 28 in the direction R is H2 and satisfies the following relation:
H1≥H2+0.2mm。
furthermore, as shown in fig. 2B and 3B, in an embodiment, the maximum height of the groove 24a in the direction Q perpendicular to the light emitting surface 12B relative to the optical film set 16 is V1, and the maximum height of the structure 28 in the direction Q relative to the optical film set 16 is V2 and satisfies the following relation:
V1≥V2+0.01mm。
as another embodiment shown in fig. 4, the backlight module 30 of fig. 4 is similar to the backlight module 10 of fig. 2A, and the difference is that in the optical film set 36 of the backlight module 30, the color conversion sheet 36a can be attached to the light-emitting surface 12b of the light guide plate 12, and other optical films 36b except the color conversion sheet 36a in the optical film set 36 are not distributed at the front end of the light guide plate 12 adjacent to the light-entering surface 12A, so that the structure 28 can directly contact the color conversion sheet 36a, such as a quantum dot material sheet.
FIG. 5 shows a chart comparing chromaticity values of an embodiment of the present invention with those of a prior art design. The curve of fig. 5 shows the variation trend of the chromaticity factor V 'from the narrow frame at one side of the backlight module to the wide frame at the other side, where the chromaticity factor V' represents a yellow chromaticity when the chromaticity factor V 'is larger, and represents a blue chromaticity when the chromaticity factor V' is smaller. It can be clearly seen from the dotted circle in fig. 5 that the V 'value of the embodiment in fig. 2 in the narrow frame area is significantly greater than the V' value of the conventional design, that is, the chromaticity in the narrow frame of the embodiment in fig. 2 is more yellow, which means that the problem of blue edge in the narrow frame can be effectively improved.
In summary, the embodiments of the present invention have at least one of the following advantages, and through the design of the embodiments, due to the matching of the protruding structure of the extension portion of the rubber frame and the structure disposed on the optical film set, the probability of light entering the image area of the backlight module directly from the edge can be reduced, the number of times of light reflection at the edge can be increased, and the effects of improving color conversion efficiency, reducing light leakage, and improving the edge bluing problem can be obtained.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is intended to cover all the modifications and equivalents of the claims and the specification, which are included in the scope of the present invention. Furthermore, it is not necessary for any embodiment or claim of the invention to achieve all of the objects or advantages or features disclosed herein. Furthermore, the terms "first," "second," and the like in the description or in the claims are used only for naming elements or distinguishing different embodiments or ranges, and are not used for limiting upper or lower limits on the number of elements.
[ notation ] to show
10. 30 backlight module
12 light guide plate
12a light incident surface
12b light emitting surface
12c bottom surface
12d, 12e, 12f side
14 light source
16. 36 optical film group
16a, 36a color conversion sheet
16b, 36b optical film
18 backboard
20 rubber frame
22 body part
24 extension part
24a groove
24b projection structure
28 Structure
32 reflective sheet
100 backlight module
102 rubber frame
104 back plate
106 light guide plate
108 optical film group
114 light source
A picture area
I. I1, I2 and I3 light rays
M end face
N top surface
P, Q, R direction
H1, H2 Width
Height V1, V2
Claims (15)
1. A backlight module comprises a light guide plate, at least one light source, an optical film set, a back plate, a plastic frame and a structure,
the light guide plate is provided with at least one light incident surface, a light emergent surface and a bottom surface which are oppositely arranged,
the at least one light source is arranged on the light incident surface and is used for emitting blue light,
the optical film set is stacked on the light-emitting surface of the light guide plate, wherein the optical film set comprises a color conversion sheet for converting the blue light into white light,
the back plate limits the light guide plate,
the rubber frame is arranged on the back plate, the rubber frame is provided with a body part abutting against the back plate and an extension part extending from the body part to the upper part of the optical membrane group, one side of the extension part facing the light guide plate is provided with a groove which is concave opposite to the light guide plate and a protruding structure which protrudes towards the light guide plate, and the distance between the protruding structure and the body part is larger than the distance between the groove and the body part,
the structure is arranged on the optical diaphragm group and accommodated in the groove, a distance is formed between the structure and the wall surface of the groove, the structure is contacted with the optical diaphragm group,
the first part of the blue light emitted by the at least one light source can be blocked by the protruding structure and cannot enter the picture area of the backlight module, and the second part of the blue light emitted by the at least one light source can be reflected by the structural object.
2. The backlight module as claimed in claim 1, wherein the body extends out of the extension portion in a direction substantially parallel to the light emitting surface.
3. The backlight module of claim 1, wherein the protruding structures and the extending portions are made of the same material.
4. The backlight module of claim 1, wherein the protruding structure is a gasket or an adhesive tape attached to one end of the extension portion.
5. The backlight module of claim 1, wherein the protruding structure forms a sidewall of the recess.
6. The backlight module of claim 1, wherein a height of the protrusion end of the protrusion structure is equal to or lower than a height of the vertex of the structure.
7. The backlight module of claim 1, wherein the protrusion has an end surface and the structure has a top surface, and a level of the end surface is equal to or lower than a level of the top surface.
8. The backlight module as claimed in claim 7, wherein the end surfaces of the protruding structures and the top surfaces of the structures are substantially parallel to the light emitting surface.
9. The backlight module of claim 1, wherein the structure is a spacer, a gel, a tape, or a film.
10. The backlight module of claim 1, wherein the structures are opaque.
11. The backlight module of claim 1, wherein the color conversion sheet is a quantum dot material sheet, and the quantum dot material sheet covers the light emitting surface.
12. The backlight module of claim 11, wherein the structures contact the sheet of quantum dot material.
13. The backlight module of claim 1, wherein the maximum width of the groove in a direction parallel to the light emitting surface is H1, and a maximum width of the structure in the direction is H2 and satisfies the following relation:
H1≥H2+0.2mm。
14. the backlight module of claim 1, wherein the maximum height of the groove relative to the optical film set in a direction perpendicular to the light exit surface is V1, and the maximum height of the structure relative to the optical film set in the direction is V2 and satisfies the following relation:
V1≥V2+0.01mm。
15. the backlight module of claim 1, wherein the light source comprises at least one blue light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510219983.2A CN106195754B (en) | 2015-05-04 | 2015-05-04 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510219983.2A CN106195754B (en) | 2015-05-04 | 2015-05-04 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106195754A CN106195754A (en) | 2016-12-07 |
| CN106195754B true CN106195754B (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510219983.2A Active CN106195754B (en) | 2015-05-04 | 2015-05-04 | Backlight module |
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| Country | Link |
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| CN (1) | CN106195754B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102576037B1 (en) | 2018-10-30 | 2023-09-08 | 삼성전자주식회사 | Display apparatus |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261381B (en) * | 2008-04-28 | 2011-12-07 | 友达光电股份有限公司 | Backlight module package assembly and preparation method |
| CN101476684B (en) * | 2009-02-09 | 2010-12-01 | 友达光电股份有限公司 | Back light module and liquid crystal display |
| CN102588849B (en) * | 2012-03-15 | 2016-07-06 | 深圳市华星光电技术有限公司 | A kind of backlight module and liquid crystal indicator |
| TWI483044B (en) * | 2012-03-27 | 2015-05-01 | Au Optronics Corp | Supporting device for supporting a light guide plate, a backlight module, a display module, and a display device using the same |
| CN103453386A (en) * | 2012-05-31 | 2013-12-18 | 鑫成科技(成都)有限公司 | Backlight module and liquid crystal display device |
| CN102809132B (en) * | 2012-07-24 | 2014-05-28 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module and back plate assembly thereof |
| CN102767762B (en) * | 2012-07-27 | 2014-10-29 | 深圳市华星光电技术有限公司 | Backlight module |
| CN102889523B (en) * | 2012-10-09 | 2015-03-11 | 深圳市华星光电技术有限公司 | Backlight module |
| CN103018935B (en) * | 2012-12-12 | 2015-07-15 | 京东方科技集团股份有限公司 | Frame assembly and liquid crystal display device |
| CN203054402U (en) * | 2013-01-21 | 2013-07-10 | 合肥京东方光电科技有限公司 | Liquid crystal display (LCD) device |
| CN103486480B (en) * | 2013-09-29 | 2016-05-11 | 青岛海信电器股份有限公司 | A kind of backlight module and display unit |
| CN203868843U (en) * | 2014-06-04 | 2014-10-08 | 北京京东方显示技术有限公司 | Backlight module and display device |
| CN104536167A (en) * | 2014-12-23 | 2015-04-22 | 深圳市华星光电技术有限公司 | Narrow-border display device |
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Effective date of registration: 20190121 Address after: Hsinchu Science Park, Taiwan, China Applicant after: Zhongqiang Photoelectric Co., Ltd. Address before: Hsinchu Science Park, Taiwan, China Applicant before: YOUNG Lighting Technology Inc |
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