CN216870857U

CN216870857U - Light guide assembly, light guide module and display device

Info

Publication number: CN216870857U
Application number: CN202220646131.7U
Authority: CN
Inventors: 庄士毅; 林育宽
Original assignee: Lite On Technology Corp
Current assignee: Lite On Technology Corp
Priority date: 2021-06-18
Filing date: 2022-03-23
Publication date: 2022-07-01
Anticipated expiration: 2032-03-23
Also published as: CN217134382U

Abstract

The utility model discloses a light guide assembly, a light guide module and a display device. The display device comprises a shell and a light guide module. The light guide module comprises at least one light emitting component and a light guide component, wherein the at least one light emitting component comprises a plurality of light emitting units, and the plurality of light emitting units can be used for emitting various light rays with different wavelengths. The light guide assembly is provided with a containing groove and at least one concave structure formed by extending from the edge of the containing groove towards the light guide direction, the at least one concave structure is communicated with the containing groove, and the at least one light emitting assembly is positioned in the containing groove and/or the at least one concave structure. The groove width of any point of the at least one concave structure is not less than that of any point of the accommodating groove. Therefore, the problem of uneven color mixing when the edge of the light guide module is mixed with white light can be improved.

Description

Light guide assembly, light guide module and display device

Technical Field

The present invention relates to a surface light emitting device, and more particularly, to a light guide module, and a display device having the light guide module, which improve color mixing unevenness and surface light emission uniformity.

Background

At present, the display equipment provided with the light guide module of the RGB LED luminous source on the market has the problems of uneven color mixing and further uneven surface light source. Therefore, how to overcome the above-mentioned drawbacks by improving the structural design has become one of the important issues to be solved by the industry.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a light guide assembly, a light guide module and a display device aiming at the defects of the prior art, which can effectively solve the problem of uneven surface light source of the display device caused by uneven RGB color mixing.

One embodiment of the present invention discloses a light guide module, including: at least one light emitting assembly comprising a plurality of light emitting units, and the plurality of light emitting units can be used for emitting a plurality of light rays with different wavelengths; the light guide assembly is provided with a containing groove and at least one concave structure formed by extending from the edge of the containing groove towards the light guide direction, the at least one concave structure is communicated with the containing groove, and the at least one light emitting assembly is positioned in the containing groove and/or the at least one concave structure; the groove width of any point of the at least one concave structure is not less than the groove width of any point of the accommodating groove.

Preferably, the at least one recess structure further includes a top portion, and a first side portion and a second side portion respectively connected to two opposite ends of the top portion, and the light emitting side of the at least one light emitting device has a first light emitting end and a second light emitting end, which are respectively located adjacent to the first side portion and the second side portion.

Preferably, a vertical distance between any point of the top and the light emitting side of the at least one light emitting assembly is not more than 3 mm.

Preferably, a perpendicular distance between an edge of the first light emitting end and the first side portion is not greater than 1/3 of the length of the at least one light emitting assembly.

Preferably, the first light-emitting end is located at the first side portion, and a perpendicular distance between an edge of the second light-emitting end and the second side portion is between 0mm and 6 mm.

Preferably, a vertical distance between one point of the top and the light emitting side of the at least one light emitting device is in inverse proportion to a shortest distance between the one point and the second side portion.

Preferably, the top is a groove angle, and the length of the first side is smaller than the length of the second side.

Preferably, one of the light emitting units of the at least one light emitting assembly is disposed opposite to the at least one recessed structure, and is disposed away from the accommodating groove relative to the other light emitting units.

Preferably, the plurality of light emitting units have different light emitting intensities, and the light emitting intensity of each light emitting unit is in a proportional relationship with respect to a vertical distance between each light emitting unit and the top.

Preferably, the at least one recess structure further comprises an optical adjusting layer formed on an inner surface of the at least one recess structure.

Preferably, the plurality of light emitting units are arranged at intervals, the number of the plurality of light emitting units is at least three, and the light rays with different wavelengths emitted by at least three light emitting units can be used for enabling human eyes to see white light.

Preferably, the number of the at least one light emitting element is plural, and the at least one light emitting element is arranged on the same straight line or different straight lines.

One embodiment of the utility model discloses a light guide assembly, which is used for conducting light rays of a plurality of light emitting assemblies, and comprises a strip-shaped accommodating groove used for accommodating the plurality of light emitting assemblies; the two concave structures extend from the edges of the two ends of the strip-shaped accommodating groove along the light guide direction, the two concave structures are communicated with the strip-shaped accommodating groove, and at least one part of the two light-emitting assemblies positioned on the outermost sides of the two ends of the strip-shaped accommodating groove is respectively arranged corresponding to the two concave structures; the groove width of any point of the two concave structures is not less than that of any point of the strip-shaped accommodating groove.

One embodiment of the present invention discloses a display apparatus, including: a housing having a light-transmitting region; and the light guide module is arranged in the shell, and a light emergent surface of the light guide module is configured relative to the light transmission area of the shell.

One of the benefits of the present invention is that, according to the technical scheme that the light guide assembly has the receiving groove and the at least one recessed structure extending from the edge of the receiving groove toward the light guide direction, the at least one recessed structure is communicated with the receiving groove, and the at least one light emitting assembly is located in the receiving groove and/or the at least one recessed structure, the number of light rays incident on the light guide assembly by the light emitting units located at the edge of the light emitting assembly is reduced, so that the reflection of the light rays by the light emitting units is reduced, the light mixing of the light emitting assembly is increased, the problem of uneven color mixing when white light is mixed at the edge of the light guide assembly is solved, and the uniformity of a surface light source of the display device can be improved.

For a better understanding of the nature and technical content of the present invention, reference should be made to the following detailed description of the utility model, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description, and not for purposes of limitation.

Drawings

Fig. 1 is a perspective view of a light guide assembly according to a first embodiment of the utility model.

Fig. 2 is a perspective view of a light guide module having the light guide assembly of fig. 1.

Fig. 3 is a partial cross-sectional view of a display device having the light guide module of fig. 2.

Fig. 4 is a partial top view of the light guide module of fig. 2.

Fig. 5 is an enlarged schematic view of a V-region portion of fig. 4.

FIG. 6 is a schematic top view of another aspect of the recess structure according to the first embodiment of the present invention.

FIG. 7 is a schematic top view of another aspect of the recess structure according to the first embodiment of the utility model (II).

FIG. 8 is a schematic top view (III) of another aspect of the recess structure according to the first embodiment of the present invention.

Fig. 9 is a schematic top view of a light guide module according to a second embodiment of the present invention.

Detailed Description

The following description is provided for the embodiments of the light guide assembly, the light guide module and the display device disclosed in the present disclosure by specific embodiments, and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The utility model is capable of other and different embodiments and its several details are capable of modifications and various changes in detail without departing from the spirit and scope of the present invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.

[ first embodiment ]

Fig. 1 to 8 are schematic views of a first embodiment of the present invention, and it should be noted that the corresponding figures and related numbers and shapes mentioned in the present embodiment are only used for describing the embodiments of the present invention in detail, so as to facilitate the understanding of the contents of the present invention, and not to limit the scope of the present invention.

As shown in fig. 3, which is a schematic partial cross-sectional view of a display device having a light guide module according to a first embodiment of the present invention, a display device 10 includes: a housing 200 and a light guide module 100 disposed in the housing 200, wherein the housing 200 has a light-transmitting region 201, and a light-emitting surface (not shown) of the light guide module 100 is disposed opposite to the light-transmitting region 201 of the housing 200, so that light emitted from the light guide module 100 can be emitted toward the light-transmitting region 201 through the light-emitting surface. In the embodiment, the display device 10 is mainly applied to commercial electronic contest products (such as an LED backlight keyboard or an RGB mouse), but the utility model is not limited thereto. For example, in other embodiments of the present invention, the display device 10 can also be applied to other electronic products (e.g., video devices or conference phones) that require RGB light mixing.

It should be noted that the light guide module 100 is described in the embodiment by being combined with the housing 200, but in other embodiments not shown in the present disclosure, the light guide module 100 may be applied separately (for example, sold) or used by being combined with other components.

As shown in fig. 1 and fig. 2, in the present embodiment, the light guide module 100 includes: at least one light emitting element 1 and one light guide element 2, and other components of the light guide module 100, such as circuit boards, are omitted for convenience of description. In the preferred embodiment, the number of the at least one light emitting element 1 is not less than two, and the light guide element 2 is made of transparent plastic, but the utility model is not limited thereto. In addition, it should be noted that the light guide element 2 is described in the embodiment as being associated with the at least one light emitting element 1, but in other embodiments not shown in the present disclosure, the light guide element 2 may be applied separately (for example, sold) or used in combination with other components.

For convenience of description and understanding, at least one light emitting device 1 and the light guide device 2 will be described in sequence, and the relative position relationship between the at least one light emitting device 1 and the light guide device 2 will be described in due course, and when describing the at least one light emitting device 1, one light emitting device 1 will be taken as an example for description, but the utility model is not limited thereto.

As shown in fig. 2 and 4, the light emitting device 1 includes a plurality of light emitting units 11, and the plurality of light emitting units 11 can be used to emit a plurality of light beams (not shown) with different wavelengths, and a light emitting surface of the light emitting device 1 is defined as a light emitting side 12. The light emitting side 12 of the light emitting device 1 has a first light emitting end 121 and a second light emitting end 122 opposite to the first light emitting end 121, and the first light emitting end 121 and the second light emitting end 122 are disposed at an interval.

In more detail, in the present embodiment, the light emitting units 11 in each light emitting assembly 1 are spaced apart from each other, and the light beams with different wavelengths emitted from the light emitting units 11 are mixed to make human eyes see white light. The plurality of light emitting units 11 have the same light emitting intensity, but the present invention is not limited thereto. For example, in other embodiments of the present invention, the number of the light emitting elements 1 and the light emitting units 11 can be adjusted according to actual requirements, and the plurality of light emitting units 11 can also have different light emitting intensities respectively.

Specifically, in the present embodiment, each light emitting unit 11 is preferably a light emitting diode, and the number of the light emitting units 11 included in each light emitting device 1 is preferably three, and the three light emitting units 11 can be respectively used for emitting red, blue and green lights, such as RGB surface mount light emitting diodes (SMD LEDs), but the utility model is not limited thereto.

Next, the light guide member 2 will be described. For convenience of illustration and understanding, the light guide assembly 2 will be described below with the light guide module 100, and a plurality of light emitting assemblies 1 are taken as an example for illustration, but the utility model is not limited thereto.

As shown in fig. 1 to 5, the light guide element 2 has a substantially strip-shaped receiving groove 21 and at least one recessed structure 22 extending from an end edge of the receiving groove 21 along the light guide direction, and a portion of at least one light emitting element 1 is located in the at least one recessed structure 22. In the preferred embodiment, the number of the at least one recess structure 22 is two, and the at least one recess structure is respectively formed on the two end edges of the receiving groove 21 and extends along the light guiding direction. Each of the concave structures 22 is communicated with the receiving groove 21, at least a portion of two light emitting assemblies 1 of the plurality of light emitting assemblies 1 disposed at two ends of the receiving groove 21 is located in the concave structure 22, and the rest of the light emitting assemblies 1 are all disposed in the receiving groove 21. That is, the light-emitting units 11 located in the recessed structure 22 are disposed away from the accommodating groove 21 relative to the other light-emitting units 11.

Each recess structure 22 is preferably disposed with one light emitting element 1 therein or at least a portion of the light emitting element 1 is located in the recess structure 22, but the utility model is not limited thereto. In other embodiments of the present invention, the number of the at least one recess structure 22, the forming position thereof, and the number of the light emitting devices 1 disposed in the recess structure 22 can also be adjusted according to actual requirements.

Specifically, as shown in fig. 5, in the present embodiment, the accommodating groove 21 has an incident portion 211 and a groove body (not labeled) connected to the incident portion 211, and the at least one light emitting element 1 is located in the groove body of the accommodating groove 21 and is spaced apart from the incident portion 211. The trough body is open and has an L-shaped cross section (along the Y-axis direction), and as shown in fig. 3, the number of at least one light emitting element 1 in the trough body is plural, and the arrangement is substantially on the same straight line, but the utility model is not limited thereto.

As shown in fig. 5, the recess structure 22 has a top portion 221, and a first side portion 222 and a second side portion 223 respectively connected to opposite ends of the top portion 221. Moreover, a vertical distance between any point of the top 221 and the light exit side 12 is greater than a vertical distance between any point of the light entrance portion 211 and the light exit side 12. On the other hand, the groove width W1 of any point of the receiving groove 21 is smaller than the groove width W2 of any point of the recess structure 22, but is not limited thereto. For example, in other embodiments, the first side portion 222 may be omitted, that is, the top portion 221 may be directly connected to the light incident portion 211 of the receiving groove 21, and the groove width W2 at the connection is substantially equal to the groove width W1, but the groove width W2 of the concave structure 22 is larger as being away from the receiving groove 21, and therefore the groove width W2 of the concave structure 22 is larger than the groove width W1 of the receiving groove 21. In the present embodiment, when the plurality of light-emitting units 11 of the at least one light-emitting device 1 respectively have different light-emitting intensities, the light-emitting intensity of each light-emitting unit 11 is in a proportional relationship with respect to the vertical distance between each light-emitting unit 11 and the top 221, but the present invention is not limited thereto.

In other words, in the present embodiment, the plurality of light emitting elements 1 located in the accommodating groove 21 and the recess structure 22 are all located on the same horizontal plane, and based on this, the vertical distance between any point of the top portion 221 and the horizontal plane (i.e. the height of the top portion 221) is not less than the vertical distance between any point of the light incident portion 211 and the horizontal plane (i.e. the height of the light incident portion 211). It should be noted that, in the embodiment, as shown in fig. 4 to 7, a vertical distance between any point of the top 221 and the light emitting side 12 of the light emitting device 1 is not greater than 3mm, but the utility model is not limited thereto.

It should be noted that, as shown in fig. 5, for the convenience of understanding and illustration, the space defined by the recessed structure 22 is indicated by dotted shading. For convenience of illustration and description, the space defined by the recessed structure 22 is not marked with dotted shading in fig. 6 to 8, and is described herein for avoiding misunderstanding.

As shown in fig. 5, the first side portion 222 and the second side portion 223 of the concave structure 22 are respectively located adjacent to the first light-emitting end 121 and the second light-emitting end 122 of the light-emitting side 12, and a vertical distance between one of the top portion 221 and the light-emitting side 12 of the light-emitting device 1 is in an inverse relationship with a shortest distance between the one and the second side portions 223. That is, the closer the one point is to the second side portion 223, the larger the distance from the light exit side 12. Or, in another way, in the present embodiment, for example, the overall concave structure 22 is a slightly trapezoidal structure, the top 221 is gradually inclined toward the light transmission direction and is an inclined side of the trapezoidal structure, the first side 222 is a top side of the trapezoidal structure, the second side 223 is a bottom side of the trapezoidal structure, and two length directions (along the Y-axis direction) of the first side 222 and the second side 223 are parallel to each other. Wherein the length of the first side portion 222 is between 1/10 times and 1 time the length of the second side portion 223, but the present invention is not limited thereto.

In addition, in the embodiment, the perpendicular distance D1 between the first side portion 222 and the edge of the first light-emitting end 121 is not greater than 1/3 of the length (along the X-axis direction) of the light-emitting device 1, but not limited thereto. Furthermore, the first light-emitting end 121 may be located in the accommodating groove 21, and a vertical distance D2 between an edge of the second light-emitting end 122 and the second side 223 is between 0mm and 6mm, and preferably between 0mm and 3mm, but the utility model is not limited thereto. For example, as shown in fig. 8, a position of the first light exiting end 121 vertically projected on the light guide element 2 may also substantially correspond to a junction between the first side portion 222 and the light entering portion 211.

In addition, in other embodiments of the present invention, the shape and structure of the recess structure 22 can be adjusted according to actual requirements. For example, the overall concave structure 22 may be a rectangular structure or a square structure, and in this case, the lengths of the first side portion 222 and the second side portion 223 may be the same. Alternatively, as shown in fig. 7, the concave structure 22 may be a pentagonal structure, that is, the top 221 is a groove angle, and the first side 222 and the second side 223 are respectively connected to the top 221 which is the groove angle, so that the top 221, the first side 222 and a part of the second side 223 form a triangular structure together, and the length of the first side 222 is smaller than that of the second side 223, in other words, the shape structure of the concave structure 22 may be adjusted and designed as required, which is not limited by the utility model.

In the past, if the SMD RGB LED is selected as the module light source, the light emitting units (red, blue, green light emitting diodes) with different wavelengths are far apart from each other, and the color light of the light emitting unit at the edge will directly hit the edge of the light guide without being mixed, and then will be reflected, causing the problem of uneven color mixing when the edge mixes white light. Therefore, the present invention can reduce the incidence of the light of the edge light-emitting unit 11 by the design of the concave structure 22, and further reduce the uneven color mixing caused by the color light accumulated on the edge due to the reflection of the light.

In addition, in other embodiments of the present invention, the recess structure 22 may further include an optical adjusting layer 224, and the optical adjusting layer 224 is formed on the inner surface of the recess structure 22. That is, the optical modifier layer 224 may be formed on at least one inner surface of the top portion 221, the first side portion 222 and the second side portion 223, but the utility model is not limited thereto.

It should be noted that the optical modifier layer 224 can be a rough layer integrally formed on the inner surface of the recess 22 or a light diffusion layer or a scattering layer coated thereon in this embodiment, but the utility model is not limited thereto.

The optical adjustment layer 224 can be used to increase the surface area of the inner surface of the at least one recess 22, reduce the flatness of the inner surface, and adjust the optical path to improve the light mixing effect, so the optical adjustment layer 224 is preferably a light diffusion layer in the embodiment, but the utility model is not limited thereto. For example, a surface or a layer (structure) formed by roughening, atomizing, and forming a microstructure on the inner surface of at least one of the recessed structures 22 can be regarded as the optical adjustment layer 224.

[ second embodiment ]

It should be noted that, as shown in fig. 9, the main differences between the present embodiment and the first embodiment are: the number of the at least one light emitting element 1 in the second embodiment is plural, and the arrangement configuration of the two light emitting elements 1 at the two opposite ends can be located on different straight lines with the other light emitting elements 1 located in the containing groove 21. For example, the two light emitting sides 12 of the two light emitting devices 1 at the two opposite ends are respectively disposed toward the junction of the top portion 221 and the second side portion 223, and are disposed at an angle with the other light emitting devices 1. That is, the two light emitting assemblies 1 at the two opposite ends are disposed obliquely with respect to the other light emitting assemblies 1 located in the accommodating groove 21. It should be noted that, when the two light emitting assemblies 1 at the opposite ends are disposed in an inclined manner, the two light emitting assemblies 1 need to be additionally provided with a carrying portion (not shown) in a matching manner for supporting, but the utility model is not limited thereto.

[ advantageous effects of embodiments ]

One of the benefits of the present invention is that the light guide assembly 2, the light guide module 100 and the display device 10 provided by the present invention can reduce the number of light rays incident on the light guide assembly 2 from the light emitting units 11 adjacent to the edge of the light guide assembly 2 in the light emitting assembly 1 by the technical scheme that the light guide assembly 2 has the receiving groove 21 and the at least one recessed structure 22 extending from the edge of the receiving groove 21 toward the light guide direction, the at least one recessed structure 22 is communicated with the receiving groove 21, and the at least one light emitting assembly 1 is located in the receiving groove 21 and/or the at least one recessed structure 22, thereby reducing the reflection of the light rays, increasing the light mixing of the light emitting assembly 1, improving the problem of uneven color mixing when the edge of the light guide module 100 mixes white light, and further improving the uniformity of the surface light source of the display device 10.

The disclosure is only a preferred embodiment of the utility model and should not be taken as limiting the scope of the utility model, so that the utility model is not limited by the disclosure of the specification and drawings.

Claims

1. A light guide module, comprising:

at least one light emitting assembly comprising a plurality of light emitting units, and the plurality of light emitting units can be used for emitting a plurality of light rays with different wavelengths; and

the light guide assembly is provided with a containing groove and at least one concave structure formed by extending from the edge of the containing groove towards the light guide direction, the at least one concave structure is communicated with the containing groove, and the at least one light emitting assembly is positioned in the containing groove and/or the at least one concave structure;

the groove width of any point of the at least one concave structure is not less than the groove width of any point of the accommodating groove.

2. The light guide module of claim 1, wherein the at least one recess structure further comprises a top portion and a first side portion and a second side portion respectively connected to opposite ends of the top portion, and the light emitting side of the at least one light emitting element has a first light emitting end and a second light emitting end respectively located adjacent to the first side portion and the second side portion.

3. A light guide module according to claim 2, wherein a vertical distance between any point of the top portion and the light exit side of the at least one light emitting element is no greater than 3 mm.

4. A light guide module according to claim 2, wherein a perpendicular distance between an edge of the first light exit end and the first side portion is no greater than 1/3 of a length of the at least one light emitting assembly.

5. A light guide module according to claim 2, wherein the first light exit end is located at the first side portion, and a perpendicular distance between an edge of the second light exit end and the second side portion is between 0mm and 6 mm.

6. A light guide module according to claim 2, wherein a vertical distance between a point on the top portion and the light emitting side of the at least one light emitting element is in inverse proportion to a shortest distance between the point and the second side portion.

7. A light guide module according to claim 2, wherein the top portion is a groove angle and the length of the first side portion is less than the length of the second side portion.

8. The light guide module of claim 1, wherein one of the light emitting units of the at least one light emitting assembly is disposed opposite to the at least one recess structure and is disposed away from the receiving groove relative to the other light emitting units.

9. The light guide module of claim 2, wherein the light emitting units respectively have different light intensities, and the light intensity of each light emitting unit is proportional to the vertical distance between the top and the light emitting unit.

10. The light guide module of claim 1, further comprising an optical modifier layer formed on an inner surface of the at least one recess.

11. The light guide module of claim 1, wherein the light emitting units are spaced apart from each other, and the number of the light emitting units is at least three, and the light beams with different wavelengths emitted by at least three of the light emitting units can be used to make human eyes see white light.

12. The light guide module of claim 1, wherein the at least one light emitting element is plural in number and arranged on the same line or different lines.

13. A light guide assembly for conducting light from a plurality of light emitting assemblies, the light guide assembly comprising:

the strip-shaped accommodating groove is used for accommodating the plurality of light-emitting assemblies; and

the two concave structures extend from the edges of the two ends of the strip-shaped accommodating groove along the light guide direction, the two concave structures are communicated with the strip-shaped accommodating groove, and at least one part of the two light-emitting assemblies positioned on the outermost sides of the two ends of the strip-shaped accommodating groove is respectively arranged corresponding to the two concave structures; the groove width of any point of the two concave structures is not less than that of any point of the strip-shaped accommodating groove.

14. A display device, characterized in that the display device comprises:

a housing having a light-transmitting region; and

the light guide module according to any one of claims 1 to 12, disposed in the housing, wherein a light emitting surface of the light guide module is disposed opposite to the light transmissive region of the housing.